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help / color / mirror / Atom feedFrom: Mihail Nikalayeu <[email protected]>
To: Antonin Houska <[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: Wed, 15 Apr 2026 17:54:12 +0200
Message-ID: <CADzfLwWz8CfqrBUmTRGT1Mme60KrFrEoDOBoyFZG47hJk3vAmQ@mail.gmail.com> (raw)
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Hello!
On Wed, Apr 15, 2026 at 4:50 PM Antonin Houska <[email protected]> wrote:
> The approach proposed by Mihail [1] seems the least problematic to me, and
> something like that occurred to me when I thought about the problem the first
> time. However, when we wake up the other processes in order to run the
> deadlock detection, they should do that immediately. I've got no good idea
> about implementation at the moment, since latch can be set for unrelated
> reasons. (Besides that, I have some more questions about this patch, which I
> can post separately.)
It is already possible to "deadlock" ANOTHER backend while running the
deadlock check [0].
Supported in current infra, just not used at the moment (my POC used that also).
[0]: https://github.com/postgres/postgres/blob/master/src/backend/storage/lmgr/proc.c#L1870-L1873
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Subject: Re: Adding REPACK [concurrently]
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