agora inbox for pgsql-hackers@postgresql.org  

help / color / mirror / Atom feed

[PATCH v8 3/7] Row pattern recognition patch (planner).
181+ messages / 2 participants
[nested] [flat]

* [PATCH v8 3/7] Row pattern recognition patch (planner).
@ 2023-09-25 05:01  Tatsuo Ishii <ishii@postgresql.org>
  0 siblings, 0 replies; 181+ messages in thread

From: Tatsuo Ishii @ 2023-09-25 05:01 UTC (permalink / raw)

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

diff --git a/src/backend/optimizer/plan/createplan.c b/src/backend/optimizer/plan/createplan.c
index 34ca6d4ac2..469fcd156b 100644
--- a/src/backend/optimizer/plan/createplan.c
+++ b/src/backend/optimizer/plan/createplan.c
@@ -286,9 +286,10 @@ static WindowAgg *make_windowagg(List *tlist, Index winref,
 								 int ordNumCols, AttrNumber *ordColIdx, Oid *ordOperators, Oid *ordCollations,
 								 int frameOptions, Node *startOffset, Node *endOffset,
 								 Oid startInRangeFunc, Oid endInRangeFunc,
-								 Oid inRangeColl, bool inRangeAsc, bool inRangeNullsFirst,
-								 List *runCondition, List *qual, bool topWindow,
-								 Plan *lefttree);
+								 Oid inRangeColl, bool inRangeAsc, bool inRangeNullsFirst, List *runCondition,
+								 RPSkipTo rpSkipTo, List *patternVariable, List *patternRegexp, List *defineClause,
+								 List *defineInitial,
+								 List *qual, bool topWindow, Plan *lefttree);
 static Group *make_group(List *tlist, List *qual, int numGroupCols,
 						 AttrNumber *grpColIdx, Oid *grpOperators, Oid *grpCollations,
 						 Plan *lefttree);
@@ -2698,6 +2699,11 @@ create_windowagg_plan(PlannerInfo *root, WindowAggPath *best_path)
 						  wc->inRangeAsc,
 						  wc->inRangeNullsFirst,
 						  wc->runCondition,
+						  wc->rpSkipTo,
+						  wc->patternVariable,
+						  wc->patternRegexp,
+						  wc->defineClause,
+						  wc->defineInitial,
 						  best_path->qual,
 						  best_path->topwindow,
 						  subplan);
@@ -6601,8 +6607,10 @@ make_windowagg(List *tlist, Index winref,
 			   int ordNumCols, AttrNumber *ordColIdx, Oid *ordOperators, Oid *ordCollations,
 			   int frameOptions, Node *startOffset, Node *endOffset,
 			   Oid startInRangeFunc, Oid endInRangeFunc,
-			   Oid inRangeColl, bool inRangeAsc, bool inRangeNullsFirst,
-			   List *runCondition, List *qual, bool topWindow, Plan *lefttree)
+			   Oid inRangeColl, bool inRangeAsc, bool inRangeNullsFirst, List *runCondition,
+			   RPSkipTo rpSkipTo, List *patternVariable, List *patternRegexp, List *defineClause,
+			   List *defineInitial,
+			   List *qual, bool topWindow, Plan *lefttree)
 {
 	WindowAgg  *node = makeNode(WindowAgg);
 	Plan	   *plan = &node->plan;
@@ -6628,6 +6636,11 @@ make_windowagg(List *tlist, Index winref,
 	node->inRangeAsc = inRangeAsc;
 	node->inRangeNullsFirst = inRangeNullsFirst;
 	node->topWindow = topWindow;
+	node->rpSkipTo = rpSkipTo,
+	node->patternVariable = patternVariable;
+	node->patternRegexp = patternRegexp;
+	node->defineClause = defineClause;
+	node->defineInitial = defineInitial;
 
 	plan->targetlist = tlist;
 	plan->lefttree = lefttree;
diff --git a/src/backend/optimizer/plan/setrefs.c b/src/backend/optimizer/plan/setrefs.c
index 5700bfb5cd..648bf5a425 100644
--- a/src/backend/optimizer/plan/setrefs.c
+++ b/src/backend/optimizer/plan/setrefs.c
@@ -2456,6 +2456,29 @@ set_upper_references(PlannerInfo *root, Plan *plan, int rtoffset)
 					   NRM_EQUAL,
 					   NUM_EXEC_QUAL(plan));
 
+	/*
+	 *	Modifies an expression tree in each DEFINE clause so that all Var
+	 *	nodes reference outputs of a subplan.
+	 */
+	if (IsA(plan, WindowAgg))
+	{
+		WindowAgg  *wplan = (WindowAgg *) plan;
+
+		foreach(l, wplan->defineClause)
+		{
+			TargetEntry *tle = (TargetEntry *) lfirst(l);
+
+			tle->expr = (Expr *)
+				fix_upper_expr(root,
+							   (Node *) tle->expr,
+							   subplan_itlist,
+							   OUTER_VAR,
+							   rtoffset,
+							   NRM_EQUAL,
+							   NUM_EXEC_QUAL(plan));
+		}
+	}
+
 	pfree(subplan_itlist);
 }
 
diff --git a/src/include/nodes/plannodes.h b/src/include/nodes/plannodes.h
index 1b787fe031..afa27bb45a 100644
--- a/src/include/nodes/plannodes.h
+++ b/src/include/nodes/plannodes.h
@@ -1096,6 +1096,21 @@ typedef struct WindowAgg
 	/* nulls sort first for in_range tests? */
 	bool		inRangeNullsFirst;
 
+	/* Row Pattern Recognition AFTER MACH SKIP clause */
+	RPSkipTo	rpSkipTo;		/* Row Pattern Skip To type */
+
+	/* Row Pattern PATTERN variable name (list of String) */
+	List		*patternVariable;
+
+	/* Row Pattern RPATTERN regular expression quantifier ('+' or ''. list of String) */
+	List		*patternRegexp;
+
+	/* Row Pattern DEFINE clause (list of TargetEntry) */
+	List	   *defineClause;
+
+	/* Row Pattern DEFINE variable initial names (list of String) */
+	List		*defineInitial;
+
 	/*
 	 * false for all apart from the WindowAgg that's closest to the root of
 	 * the plan
-- 
2.25.1


----Next_Part(Mon_Sep_25_14_26_30_2023_752)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
 filename="v8-0004-Row-pattern-recognition-patch-executor.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread

* [PATCH v7 2/3] Assign backend type earlier
@ 2025-11-26 00:09  Euler Taveira <euler@eulerto.com>
  0 siblings, 0 replies; 181+ messages in thread

From: Euler Taveira @ 2025-11-26 00:09 UTC (permalink / raw)

Instead of assigning the backend type into the Main function of each
postmaster child, do it earlier (after fork()). The backend type is
already known by postmaster_child_launch() before it calls fork(). This
reduces the time frame that MyBackendType is correct. (This is important
for log_min_messages per backend type that relies on a known
MyBackendType to decide if it writes a log message or not.)
---
 src/backend/postmaster/autovacuum.c        | 2 --
 src/backend/postmaster/bgworker.c          | 1 -
 src/backend/postmaster/bgwriter.c          | 1 -
 src/backend/postmaster/checkpointer.c      | 1 -
 src/backend/postmaster/launch_backend.c    | 2 ++
 src/backend/postmaster/pgarch.c            | 1 -
 src/backend/postmaster/startup.c           | 1 -
 src/backend/postmaster/syslogger.c         | 1 -
 src/backend/postmaster/walsummarizer.c     | 1 -
 src/backend/postmaster/walwriter.c         | 1 -
 src/backend/replication/logical/slotsync.c | 2 --
 src/backend/replication/walreceiver.c      | 1 -
 src/backend/storage/aio/method_worker.c    | 1 -
 13 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 1c38488f2cb..36c1911a3a8 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -388,7 +388,6 @@ AutoVacLauncherMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_LAUNCHER;
 	init_ps_display(NULL);
 
 	ereport(DEBUG1,
@@ -1401,7 +1400,6 @@ AutoVacWorkerMain(const void *startup_data, size_t startup_data_len)
 		PostmasterContext = NULL;
 	}
 
-	MyBackendType = B_AUTOVAC_WORKER;
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 142a02eb5e9..260f051711e 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -741,7 +741,6 @@ BackgroundWorkerMain(const void *startup_data, size_t startup_data_len)
 	}
 
 	MyBgworkerEntry = worker;
-	MyBackendType = B_BG_WORKER;
 	init_ps_display(worker->bgw_name);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
index 72f5acceec7..4119758a72c 100644
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -94,7 +94,6 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_BG_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index afb3d6d8630..427f50752d4 100644
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -199,7 +199,6 @@ CheckpointerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_CHECKPOINTER;
 	AuxiliaryProcessMainCommon();
 
 	CheckpointerShmem->checkpointer_pid = MyProcPid;
diff --git a/src/backend/postmaster/launch_backend.c b/src/backend/postmaster/launch_backend.c
index c2a044321d1..35420b8c9fb 100644
--- a/src/backend/postmaster/launch_backend.c
+++ b/src/backend/postmaster/launch_backend.c
@@ -224,6 +224,8 @@ postmaster_child_launch(BackendType child_type, int child_slot,
 	pid = fork_process();
 	if (pid == 0)				/* child */
 	{
+		MyBackendType = child_type;
+
 		/* Capture and transfer timings that may be needed for logging */
 		if (IsExternalConnectionBackend(child_type))
 		{
diff --git a/src/backend/postmaster/pgarch.c b/src/backend/postmaster/pgarch.c
index ce6b5299324..b760d1aed40 100644
--- a/src/backend/postmaster/pgarch.c
+++ b/src/backend/postmaster/pgarch.c
@@ -222,7 +222,6 @@ PgArchiverMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_ARCHIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/postmaster/startup.c b/src/backend/postmaster/startup.c
index 27e86cf393f..13e86a2921e 100644
--- a/src/backend/postmaster/startup.c
+++ b/src/backend/postmaster/startup.c
@@ -217,7 +217,6 @@ StartupProcessMain(const void *startup_data, size_t startup_data_len)
 {
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_STARTUP;
 	AuxiliaryProcessMainCommon();
 
 	/* Arrange to clean up at startup process exit */
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index 50c2edec1f6..a378b15a6de 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -206,7 +206,6 @@ SysLoggerMain(const void *startup_data, size_t startup_data_len)
 
 	now = MyStartTime;
 
-	MyBackendType = B_LOGGER;
 	init_ps_display(NULL);
 
 	/*
diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index c4a888a081c..ce497d8ec42 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -234,7 +234,6 @@ WalSummarizerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_SUMMARIZER;
 	AuxiliaryProcessMainCommon();
 
 	ereport(DEBUG1,
diff --git a/src/backend/postmaster/walwriter.c b/src/backend/postmaster/walwriter.c
index fd92c8b7a33..c1b4ddda555 100644
--- a/src/backend/postmaster/walwriter.c
+++ b/src/backend/postmaster/walwriter.c
@@ -94,7 +94,6 @@ WalWriterMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_WRITER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/replication/logical/slotsync.c b/src/backend/replication/logical/slotsync.c
index 7e3b4c4413e..364df1ad519 100644
--- a/src/backend/replication/logical/slotsync.c
+++ b/src/backend/replication/logical/slotsync.c
@@ -1436,8 +1436,6 @@ ReplSlotSyncWorkerMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_SLOTSYNC_WORKER;
-
 	init_ps_display(NULL);
 
 	Assert(GetProcessingMode() == InitProcessing);
diff --git a/src/backend/replication/walreceiver.c b/src/backend/replication/walreceiver.c
index 3a94c9683a7..154fe9e0cb5 100644
--- a/src/backend/replication/walreceiver.c
+++ b/src/backend/replication/walreceiver.c
@@ -168,7 +168,6 @@ WalReceiverMain(const void *startup_data, size_t startup_data_len)
 
 	Assert(startup_data_len == 0);
 
-	MyBackendType = B_WAL_RECEIVER;
 	AuxiliaryProcessMainCommon();
 
 	/*
diff --git a/src/backend/storage/aio/method_worker.c b/src/backend/storage/aio/method_worker.c
index 866a35abbd1..64caaa7b766 100644
--- a/src/backend/storage/aio/method_worker.c
+++ b/src/backend/storage/aio/method_worker.c
@@ -390,7 +390,6 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 	volatile int error_errno = 0;
 	char		cmd[128];
 
-	MyBackendType = B_IO_WORKER;
 	AuxiliaryProcessMainCommon();
 
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
-- 
2.47.3


--grg2fqqi6tkdt5me
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v7-0003-Fixup-assign-backend-type-earlier.patch"



^ permalink  raw  reply  [nested|flat] 181+ messages in thread