Re-add tracking of wait event SLRUFlushSync

michaelpq · michaelpq · commit 84cc1426745b · 2023-04-26T07:10:06.000+09:00
SLRUFlushSync has been accidently removed during dee663f, that has moved the flush of the SLRU files to the checkpointer, so add it back. The issue has been noticed by Thomas when checking for orphaned wait events. Author: Thomas Munro Reviewed-by: Bharath Rupireddy Discussion: https://postgr.es/m/CA+hUKGK6tqm59KuF1z+h5Y8fsWcu5v8+84kduSHwRzwjB2aa_A@mail.gmail.com
diff --git a/src/backend/access/transam/slru.c b/src/backend/access/transam/slru.c
@@ -1603,7 +1603,9 @@ SlruSyncFileTag(SlruCtl ctl, const FileTag *ftag, char *path)
 	if (fd < 0)
 		return -1;
 
+	pgstat_report_wait_start(WAIT_EVENT_SLRU_FLUSH_SYNC);
 	result = pg_fsync(fd);
+	pgstat_report_wait_end();
 	save_errno = errno;
 
 	CloseTransientFile(fd);
