Flush WAL stats in bgwriter

hlinnaka · pull[bot] · commit 81bddc185b50 · 2024-03-08T00:33:49.000Z
bgwriter can write out WAL, but did not flush the WAL pgstat counters, so the writes were not seen in pg_stat_wal. Back-patch to v14, where pg_stat_wal was introduced. Author: Nazir Bilal Yavuz Reviewed-by: Matthias van de Meent, Kyotaro Horiguchi Discussion: https://www.postgresql.org/message-id/CAN55FZ2FPYngovZstr%3D3w1KSEHe6toiZwrurbhspfkXe5UDocg%40mail.gmail.com
diff --git a/src/backend/postmaster/bgwriter.c b/src/backend/postmaster/bgwriter.c
@@ -241,6 +241,7 @@ BackgroundWriterMain(void)
 
 		/* Report pending statistics to the cumulative stats system */
 		pgstat_report_bgwriter();
+		pgstat_report_wal(true);
 
 		if (FirstCallSinceLastCheckpoint())
 		{

Original file line number	Diff line number	Diff line change
`@@ -241,6 +241,7 @@ BackgroundWriterMain(void)`
`241`	`241`
`242`	`242`	`/* Report pending statistics to the cumulative stats system */`
`243`	`243`	`pgstat_report_bgwriter();`
	`244`	`+ pgstat_report_wal(true);`
`244`	`245`
`245`	`246`	`if (FirstCallSinceLastCheckpoint())`
`246`	`247`	`{`