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[PATCH v53 5/7] Check for transaction block early in ExecRepack
249+ messages / 2 participants
[nested] [flat]

* [PATCH v53 5/7] Check for transaction block early in ExecRepack
@ 2026-04-03 15:23  Srinath Reddy Sadipiralla <srinath2133@gmail.com>
  0 siblings, 0 replies; 249+ messages in thread

From: Srinath Reddy Sadipiralla @ 2026-04-03 15:23 UTC (permalink / raw)

Currently, executing REPACK (CONCURRENTLY) without a table name inside a
transaction block throws the error "REPACK CONCURRENTLY requires explicit
table name" instead of the expected transaction block error. This occurs
because ExecRepack() validates the parsed options and missing relation
before verifying the transaction state.

This behavior is inconsistent with other utility commands like VACUUM
,REINDEX, etc; which invoke PreventInTransactionBlock() at the very start
of their execution to properly reject execution inside user transactions
before validating targets.

Add PreventInTransactionBlock to the top of ExecRepack() to enforce the
transaction block restriction early. This prevents the user from fixing
a missing table error only to immediately hit a transaction block error,
and also ensures consistency with rest of the commands.

Author: Srinath Reddy Sadipiralla <srinath2133@gmail.com>
---
 src/backend/commands/repack.c | 27 +++++++++++++++------------
 1 file changed, 15 insertions(+), 12 deletions(-)

diff --git a/src/backend/commands/repack.c b/src/backend/commands/repack.c
index f2759cdbef1..8d9b2b2e370 100644
--- a/src/backend/commands/repack.c
+++ b/src/backend/commands/repack.c
@@ -279,6 +279,21 @@ ExecRepack(ParseState *pstate, RepackStmt *stmt, bool isTopLevel)
 	/* Determine the lock mode to use. */
 	lockmode = RepackLockLevel((params.options & CLUOPT_CONCURRENT) != 0);
 
+	if ((params.options & CLUOPT_CONCURRENT) != 0)
+	{
+		/*
+		 * Make sure we're not in a transaction block.
+		 *
+		 * The reason is that repack_setup_logical_decoding() could wait
+		 * indefinitely for our XID to complete. (The deadlock detector would
+		 * not recognize it because we'd be waiting for ourselves, i.e. no
+		 * real lock conflict.) It would be possible to run in a transaction
+		 * block if we had no XID, but this restriction is simpler for users
+		 * to understand and we don't lose any functionality.
+		 */
+		PreventInTransactionBlock(isTopLevel, "REPACK (CONCURRENTLY)");
+	}
+
 	/*
 	 * If a single relation is specified, process it and we're done ... unless
 	 * the relation is a partitioned table, in which case we fall through.
@@ -511,19 +526,7 @@ cluster_rel(RepackCommand cmd, Relation OldHeap, Oid indexOid,
 	 * replica index OID.
 	 */
 	if (concurrent)
-	{
-		/*
-		 * Make sure we're not in a transaction block.
-		 *
-		 * The reason is that repack_setup_logical_decoding() could deadlock
-		 * if there's an XID already assigned.  It would be possible to run in
-		 * a transaction block if we had no XID, but this restriction is
-		 * simpler for users to understand and we don't lose anything.
-		 */
-		PreventInTransactionBlock(isTopLevel, "REPACK (CONCURRENTLY)");
-
 		check_repack_concurrently_requirements(OldHeap, &ident_idx);
-	}
 
 	/* Check for user-requested abort. */
 	CHECK_FOR_INTERRUPTS();
-- 
2.47.3


--qr3jlalmmcpkiodg
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v53-0006-Error-out-any-process-that-would-block-at-REPACK.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]

Thread overview: 249+ messages (download: mbox mbox.gz follow: Atom feed)
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2026-04-03 15:23 [PATCH v53 5/7] Check for transaction block early in ExecRepack Srinath Reddy Sadipiralla <srinath2133@gmail.com>
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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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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