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From: Andrey Borodin <[email protected]>
To: Thom Brown <[email protected]>
Cc: Michael Paquier <[email protected]>
Cc: Alvaro Herrera <[email protected]>
Cc: vignesh C <[email protected]>
Cc: Andrew Borodin <[email protected]>
Cc: Yura Sokolov <[email protected]>
Cc: Andres Freund <[email protected]>
Cc: Thomas Munro <[email protected]>
Cc: Gilles Darold <[email protected]>
Cc: Alexander Korotkov <[email protected]>
Cc: Daniel Gustafsson <[email protected]>
Cc: Kyotaro Horiguchi <[email protected]>
Cc: pgsql-hackers mailing list <[email protected]>
Subject: Re: MultiXact\SLRU buffers configuration
Date: Mon, 28 Jul 2025 22:23:24 +0500
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAA-aLv7-fs32r7v8znJ=uPPtQNqZ9_sH2REn=cu1pyEQ=tuEhw@mail.gmail.com>
References: <[email protected]>
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Hi Thom!

> On 1 Nov 2024, at 00:25, Thom Brown <[email protected]> wrote:
> 
> 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/[email protected]

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