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-rw-r--r--src/backend/utils/activity/pgstat.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/backend/utils/activity/pgstat.c b/src/backend/utils/activity/pgstat.c
index f48b00b86bf..ed7baa6e046 100644
--- a/src/backend/utils/activity/pgstat.c
+++ b/src/backend/utils/activity/pgstat.c
@@ -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;