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-rw-r--r--src/backend/bootstrap/bootstrap.c4
-rw-r--r--src/backend/tcop/postgres.c4
-rw-r--r--src/backend/utils/init/postinit.c5
3 files changed, 10 insertions, 3 deletions
diff --git a/src/backend/bootstrap/bootstrap.c b/src/backend/bootstrap/bootstrap.c
index 7787c1199b1..82ef726574e 100644
--- a/src/backend/bootstrap/bootstrap.c
+++ b/src/backend/bootstrap/bootstrap.c
@@ -359,6 +359,10 @@ AuxiliaryProcessMain(int argc, char *argv[])
SetProcessingMode(BootstrapProcessing);
IgnoreSystemIndexes = true;
+ /* Initialize MaxBackends (if under postmaster, was done already) */
+ if (!IsUnderPostmaster)
+ InitializeMaxBackends();
+
BaseInit();
/*
diff --git a/src/backend/tcop/postgres.c b/src/backend/tcop/postgres.c
index 937191334fc..407c548cf8f 100644
--- a/src/backend/tcop/postgres.c
+++ b/src/backend/tcop/postgres.c
@@ -3654,10 +3654,8 @@ PostgresMain(int argc, char *argv[], const char *username)
*/
CreateDataDirLockFile(false);
- /* In EXEC_BACKEND, this was set via BackendParameters */
-#ifndef EXEC_BACKEND
+ /* Initialize MaxBackends (if under postmaster, was done already) */
InitializeMaxBackends();
-#endif
}
/* Early initialization */
diff --git a/src/backend/utils/init/postinit.c b/src/backend/utils/init/postinit.c
index ddd79d0aa2d..7e21ceae880 100644
--- a/src/backend/utils/init/postinit.c
+++ b/src/backend/utils/init/postinit.c
@@ -427,6 +427,11 @@ pg_split_opts(char **argv, int *argcp, char *optstr)
* This must be called after modules have had the chance to register background
* workers in shared_preload_libraries, and before shared memory size is
* determined.
+ *
+ * Note that in EXEC_BACKEND environment, the value is passed down from
+ * postmaster to subprocesses via BackendParameters in SubPostmasterMain; only
+ * postmaster itself and processes not under postmaster control should call
+ * this.
*/
void
InitializeMaxBackends(void)