postgres
diff --git a/‎src/backend/utils/activity/pgstat.c
Copy file name to clipboardExpand all lines: src/backend/utils/activity/pgstat.c
+3Lines changed: 3 additions & 0 deletions b/‎src/backend/utils/activity/pgstat.c
Copy file name to clipboardExpand all lines: src/backend/utils/activity/pgstat.c
+3Lines changed: 3 additions & 0 deletions
@@ -1360,6 +1360,9 @@ pgstat_write_statsfile(void)
 
 	pgstat_assert_is_up();
 
+	/* should be called only by the checkpointer or single user mode */
+	Assert(!IsUnderPostmaster || MyBackendType == B_CHECKPOINTER);
+
 	/* we're shutting down, so it's ok to just override this */
 	pgstat_fetch_consistency = PGSTAT_FETCH_CONSISTENCY_NONE;