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[PATCH v9 3/7] Row pattern recognition patch (planner).
249+ messages / 2 participants
[nested] [flat]

* [PATCH v9 3/7] Row pattern recognition patch (planner).
@ 2023-10-04 05:51 Tatsuo Ishii <ishii@postgresql.org>
  0 siblings, 0 replies; 249+ messages in thread

From: Tatsuo Ishii @ 2023-10-04 05:51 UTC (permalink / raw)

---
 src/backend/optimizer/plan/createplan.c | 23 ++++++++++++++++++-----
 src/backend/optimizer/plan/setrefs.c    | 23 +++++++++++++++++++++++
 src/include/nodes/plannodes.h           | 15 +++++++++++++++
 3 files changed, 56 insertions(+), 5 deletions(-)

diff --git a/src/backend/optimizer/plan/createplan.c b/src/backend/optimizer/plan/createplan.c
index 34ca6d4ac2..469fcd156b 100644
--- a/src/backend/optimizer/plan/createplan.c
+++ b/src/backend/optimizer/plan/createplan.c
@@ -286,9 +286,10 @@ static WindowAgg *make_windowagg(List *tlist, Index winref,
 								 int ordNumCols, AttrNumber *ordColIdx, Oid *ordOperators, Oid *ordCollations,
 								 int frameOptions, Node *startOffset, Node *endOffset,
 								 Oid startInRangeFunc, Oid endInRangeFunc,
-								 Oid inRangeColl, bool inRangeAsc, bool inRangeNullsFirst,
-								 List *runCondition, List *qual, bool topWindow,
-								 Plan *lefttree);
+								 Oid inRangeColl, bool inRangeAsc, bool inRangeNullsFirst, List *runCondition,
+								 RPSkipTo rpSkipTo, List *patternVariable, List *patternRegexp, List *defineClause,
+								 List *defineInitial,
+								 List *qual, bool topWindow, Plan *lefttree);
 static Group *make_group(List *tlist, List *qual, int numGroupCols,
 						 AttrNumber *grpColIdx, Oid *grpOperators, Oid *grpCollations,
 						 Plan *lefttree);
@@ -2698,6 +2699,11 @@ create_windowagg_plan(PlannerInfo *root, WindowAggPath *best_path)
 						  wc->inRangeAsc,
 						  wc->inRangeNullsFirst,
 						  wc->runCondition,
+						  wc->rpSkipTo,
+						  wc->patternVariable,
+						  wc->patternRegexp,
+						  wc->defineClause,
+						  wc->defineInitial,
 						  best_path->qual,
 						  best_path->topwindow,
 						  subplan);
@@ -6601,8 +6607,10 @@ make_windowagg(List *tlist, Index winref,
 			   int ordNumCols, AttrNumber *ordColIdx, Oid *ordOperators, Oid *ordCollations,
 			   int frameOptions, Node *startOffset, Node *endOffset,
 			   Oid startInRangeFunc, Oid endInRangeFunc,
-			   Oid inRangeColl, bool inRangeAsc, bool inRangeNullsFirst,
-			   List *runCondition, List *qual, bool topWindow, Plan *lefttree)
+			   Oid inRangeColl, bool inRangeAsc, bool inRangeNullsFirst, List *runCondition,
+			   RPSkipTo rpSkipTo, List *patternVariable, List *patternRegexp, List *defineClause,
+			   List *defineInitial,
+			   List *qual, bool topWindow, Plan *lefttree)
 {
 	WindowAgg  *node = makeNode(WindowAgg);
 	Plan	   *plan = &node->plan;
@@ -6628,6 +6636,11 @@ make_windowagg(List *tlist, Index winref,
 	node->inRangeAsc = inRangeAsc;
 	node->inRangeNullsFirst = inRangeNullsFirst;
 	node->topWindow = topWindow;
+	node->rpSkipTo = rpSkipTo,
+	node->patternVariable = patternVariable;
+	node->patternRegexp = patternRegexp;
+	node->defineClause = defineClause;
+	node->defineInitial = defineInitial;
 
 	plan->targetlist = tlist;
 	plan->lefttree = lefttree;
diff --git a/src/backend/optimizer/plan/setrefs.c b/src/backend/optimizer/plan/setrefs.c
index 7962200885..20ce399763 100644
--- a/src/backend/optimizer/plan/setrefs.c
+++ b/src/backend/optimizer/plan/setrefs.c
@@ -2456,6 +2456,29 @@ set_upper_references(PlannerInfo *root, Plan *plan, int rtoffset)
 					   NRM_EQUAL,
 					   NUM_EXEC_QUAL(plan));
 
+	/*
+	 *	Modifies an expression tree in each DEFINE clause so that all Var
+	 *	nodes reference outputs of a subplan.
+	 */
+	if (IsA(plan, WindowAgg))
+	{
+		WindowAgg  *wplan = (WindowAgg *) plan;
+
+		foreach(l, wplan->defineClause)
+		{
+			TargetEntry *tle = (TargetEntry *) lfirst(l);
+
+			tle->expr = (Expr *)
+				fix_upper_expr(root,
+							   (Node *) tle->expr,
+							   subplan_itlist,
+							   OUTER_VAR,
+							   rtoffset,
+							   NRM_EQUAL,
+							   NUM_EXEC_QUAL(plan));
+		}
+	}
+
 	pfree(subplan_itlist);
 }
 
diff --git a/src/include/nodes/plannodes.h b/src/include/nodes/plannodes.h
index 8cafbf3f8a..e48b59517d 100644
--- a/src/include/nodes/plannodes.h
+++ b/src/include/nodes/plannodes.h
@@ -1096,6 +1096,21 @@ typedef struct WindowAgg
 	/* nulls sort first for in_range tests? */
 	bool		inRangeNullsFirst;
 
+	/* Row Pattern Recognition AFTER MACH SKIP clause */
+	RPSkipTo	rpSkipTo;		/* Row Pattern Skip To type */
+
+	/* Row Pattern PATTERN variable name (list of String) */
+	List		*patternVariable;
+
+	/* Row Pattern RPATTERN regular expression quantifier ('+' or ''. list of String) */
+	List		*patternRegexp;
+
+	/* Row Pattern DEFINE clause (list of TargetEntry) */
+	List	   *defineClause;
+
+	/* Row Pattern DEFINE variable initial names (list of String) */
+	List		*defineInitial;
+
 	/*
 	 * false for all apart from the WindowAgg that's closest to the root of
 	 * the plan
-- 
2.25.1


----Next_Part(Wed_Oct__4_15_03_28_2023_821)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
 filename="v9-0004-Row-pattern-recognition-patch-executor.patch"



^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread

* [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners
@ 2026-06-03 17:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 249+ messages in thread

From: Andres Freund @ 2026-06-03 17:41 UTC (permalink / raw)

Without windows-vs is about 10min slower than the others tasks (windows-vs is
currently 31m40s, windows-mingw is 20m45s), which makes for a frustrating
experience. It seems worth "sacrificing" one of the 20 available concurrent
jobs to avoid that. This reduces the time down to about 18m.

ci-os-only: windows
---
 .github/workflows/pg-ci.yml | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pg-ci.yml b/.github/workflows/pg-ci.yml
index 93b17af46df..83ee93ce5d6 100644
--- a/.github/workflows/pg-ci.yml
+++ b/.github/workflows/pg-ci.yml
@@ -723,8 +723,13 @@ jobs:
 
 
   # Job: Windows - Visual Studio
+  #
+  # If we were to execute tests in this job serially, this would be the
+  # slowest job by a good margin. To avoid that, use a matrix in combination
+  # with meson test's --slice SLICE/NUM_SLICES mechanism to split the tests
+  # across two runners.
   windows-vs:
-    name: Windows - Visual Studio
+    name: Windows - Visual Studio - Slice ${{ matrix.slice}}/${{ matrix.num_slices}}
     needs: [setup, sanity-check]
     if: |
       !cancelled() &&
@@ -732,6 +737,17 @@ jobs:
       needs.sanity-check.result != 'failure'
     runs-on: windows-2022
     timeout-minutes: 60
+
+    # As described at the top of the task, split the tests across two runners
+    # for performance. The gains from additional concurrency diminish
+    # relatively quickly, due to each instance having to install dependencies
+    # and build postgres.
+    strategy:
+      fail-fast: false
+      matrix:
+        num_slices: [2]
+        slice: [1, 2]
+
     env:
       # Avoid port conflicts between concurrent tap tests
       PG_TEST_USE_UNIX_SOCKETS: 1
@@ -885,6 +901,11 @@ jobs:
 
       - name: Test world
         env:
+          # As described at the top of the task, split the tests across two
+          # runners for performance.  It's not the prettiest to implement this
+          # by prepending to MTEST_TARGET, but a more complicated solution
+          # doesn't seem worth it.
+          MTEST_TARGET: --slice ${{ matrix.slice}}/${{ matrix.num_slices}} ${{env.MTEST_TARGET}}
           ADDITIONAL_SETUP: |
             call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
         run: *meson_test_world_cmd
-- 
2.54.0.380.gc69baaf57b


--lyfxwjjve3vodszg--





^ permalink  raw  reply  [nested|flat] 249+ messages in thread


end of thread, other threads:[~2026-06-03 17:41 UTC | newest]

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2023-10-04 05:51 [PATCH v9 3/7] Row pattern recognition patch (planner). Tatsuo Ishii <ishii@postgresql.org>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
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2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
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2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>
2026-06-03 17:41 [PATCH v9a 22/22] ci: Slice tests on windows-vs across two runners Andres Freund <andres@anarazel.de>

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