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help / color / mirror / Atom feedFrom: Antonin Houska <[email protected]>
To: Mihail Nikalayeu <[email protected]>
Cc: Andres Freund <[email protected]>
Cc: Amit Kapila <[email protected]>
Cc: Alvaro Herrera <[email protected]>
Cc: Srinath Reddy Sadipiralla <[email protected]>
Cc: Matthias van de Meent <[email protected]>
Cc: Pg Hackers <[email protected]>
Cc: Robert Treat <[email protected]>
Subject: Re: Adding REPACK [concurrently]
Date: Mon, 20 Apr 2026 19:44:52 +0200
Message-ID: <68264.1776707092@localhost> (raw)
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Mihail Nikalayeu <[email protected]> wrote:
> I've briefly looked at your patch. As I understand it, it cancels the other
> process only when REPACK actually tries to upgrade the lock. ...
>
> AFAIU, Andres's concern is that the "victim" should be cancelled
> sooner, rather than waiting until REPACK actually attempts the
> upgrade.
I thought the point is that the deadlock should be resolved in a controlled
way, i.e. w/o relying on deadlock timeout. Once both processes sleep, the
decision which one should be kicked off is effectively random. In other words,
the actual deadlock IMO starts exactly at the moment both processes end up
sleeping. But I may be wrong.
--
Antonin Houska
Web: https://www.cybertec-postgresql.com
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To: [email protected]
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Subject: Re: Adding REPACK [concurrently]
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