Re: May be BUG. Periodic burst growth of the checkpoint_req counter on replica.

Hi,

On 2022-09-19 01:29:21 +0300, Anton A. Melnikov wrote:
> Corrected patch is attached (v2-0001-Fix-burst-checkpoint_req-growth.patch).

This patch doesn't pass the main regression tests tests successfully:

https://cirrus-ci.com/task/5502700019253248

diff -U3 /tmp/cirrus-ci-build/src/test/regress/expected/rules.out
/tmp/cirrus-ci-build/build/testrun/regress/regress/results/rules.out
--- /tmp/cirrus-ci-build/src/test/regress/expected/rules.out    2022-12-06 05:49:53.687424000 +0000
+++ /tmp/cirrus-ci-build/build/testrun/regress/regress/results/rules.out    2022-12-06 05:53:04.642690000 +0000
@@ -1816,6 +1816,9 @@
    FROM pg_stat_get_archiver() s(archived_count, last_archived_wal, last_archived_time, failed_count, last_failed_wal,
last_failed_time,stats_reset);
 
 pg_stat_bgwriter| SELECT pg_stat_get_bgwriter_timed_checkpoints() AS checkpoints_timed,
     pg_stat_get_bgwriter_requested_checkpoints() AS checkpoints_req,
+    pg_stat_get_bgwriter_timed_restartpoints() AS restartpoints_timed,
+    pg_stat_get_bgwriter_requested_restartpoints() AS restartpoints_req,
+    pg_stat_get_bgwriter_performed_restartpoints() AS restartpoints_done,
     pg_stat_get_checkpoint_write_time() AS checkpoint_write_time,
     pg_stat_get_checkpoint_sync_time() AS checkpoint_sync_time,
     pg_stat_get_bgwriter_buf_written_checkpoints() AS buffers_checkpoint,

Greetings,

Andres Freund