Horton

Re: False "pg_serial": apparent wraparound” in logs

Michael Paquier <michael@paquier.xyz>

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From: Michael Paquier <michael@paquier.xyz>
To: Heikki Linnakangas <hlinnaka@iki.fi>
Cc: "Imseih (AWS), Sami" <simseih@amazon.com>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Date: 2023-10-04T00:07:21Z
Lists: pgsql-hackers 
On Sun, Oct 01, 2023 at 09:43:21PM +0300, Heikki Linnakangas wrote:
> I think the smallest fix here would be to change CheckPointPredicate() so
> that if tailPage > headPage, pass headPage to SimpleLruTruncate() instead of
> tailPage. Or perhaps it should go into the "The SLRU is no longer needed"
> codepath in that case. If tailPage > headPage, the SLRU isn't needed at the
> moment.

Good idea.  Indeed that should be good and simple enough for the
back-branches, at quick glance.
--
Michael

Commits

  1. Improve truncation of pg_serial/, removing "apparent wraparound" LOGs