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Subject: Re: MultiXact\SLRU buffers configuration
From: "Andrey M. Borodin" <x4mmm@yandex-team.ru>
In-Reply-To: <CAA-aLv7AcTh+O9rnoPVbck=Fw8atMOYrUttk5G9ctFhXOsqQbw@mail.gmail.com>
Date: Thu, 31 Oct 2024 14:46:37 +0400
Cc: Michael Paquier <michael@paquier.xyz>,
 Alvaro Herrera <alvherre@alvh.no-ip.org>,
 vignesh C <vignesh21@gmail.com>,
 Andrew Borodin <amborodin86@gmail.com>,
 Yura Sokolov <y.sokolov@postgrespro.ru>,
 Andres Freund <andres@anarazel.de>,
 Thomas Munro <thomas.munro@gmail.com>,
 Gilles Darold <gilles@darold.net>,
 Alexander Korotkov <aekorotkov@gmail.com>,
 Daniel Gustafsson <daniel@yesql.se>,
 Kyotaro Horiguchi <horikyota.ntt@gmail.com>,
 pgsql-hackers mailing list <pgsql-hackers@postgresql.org>
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To: Thom Brown <thom@linux.com>
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> On 29 Oct 2024, at 21:45, Thom Brown <thom@linux.com> wrote:
>=20
> It clearly checks for interrupts, but when I saw this issue happen, it
> wasn't interruptible.

Perhaps, that was different multixacts?
When I was observing this pathology on Standby, it was a stream of =
different reads encountering different multis.

Either way startup can cancel locking process on it's own. Or is it the =
case that cancel was not enough, did you actually need termination, not =
cancel?

Thanks!


Best regards, Andrey Borodin.=