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Re: Adding REPACK [concurrently] - Mailing list pgsql-hackers

From Amit Kapila
Subject Re: Adding REPACK [concurrently]
Date
Msg-id CAA4eK1KWDbBk4FgbbWdivQLrPPzR4zgvfnHK4WjWC78rbuRVbg@mail.gmail.com
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In response to Re: Adding REPACK [concurrently]  (Antonin Houska <ah@cybertec.at>)
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On Tue, Apr 7, 2026 at 7:49 PM Antonin Houska <ah@cybertec.at> wrote:
>
> Hayato Kuroda (Fujitsu) <kuroda.hayato@fujitsu.com> wrote:
>
> > 02. SnapBuildProcessRunningXacts
> >
> > Per my understanding, the db_specic snapshot can be also serialized. Is it
> > possibility tha normal logical decoding system restores the snapshot and obtain
> > the wrong result?
>
> I don't think that the database-specific xl_running_xacts WAL record affects
> what SnapBuildSerialize() writes to disk: the contents of builder->committed,
> etc. is updated by decoding COMMIT and ABORT records.
>

I think the point is that the other process say a walsender could
restore such a snapshot making it take the wrong decision.

--
With Regards,
Amit Kapila.

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