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Subject: Re: MultiXact\SLRU buffers configuration
From: Andrey Borodin <x4mmm@yandex-team.ru>
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Date: Mon, 28 Jul 2025 22:23:24 +0500
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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Hi Thom!

> On 1 Nov 2024, at 00:25, Thom Brown <thom@linux.com> wrote:
>=20
> Unfortunately I didn't gather much information when it was occuring, =
and prioritised getting rid of the process blocking replay. I just =
attached gdb to it, got a backtrace and then "print =
ProcessInterrupts()".

FWIW we diagnosed that problem in the recent thread =
"IPC/MultixactCreation on the Standby server" [0].
Proposed fix is non-trivial. I'm trying to asses how many reports we had =
about this problem. Did you ever observe this problem again?

Thanks!


Best regards, Andrey Borodin.

[0] =
https://www.postgresql.org/message-id/172e5723-d65f-4eec-b512-14beacb326ce=
@yandex.ru=