Re: incremental backup issue

From: Fabrice Chapuis <fabrice636861(at)gmail(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: incremental backup issue
Date: 2026-02-19 08:27:05
Message-ID: CAA5-nLCPdb3nsjFCvTdjug+owrCgZRbqmgmZN9qt5NWF78HgTA@mail.gmail.com
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I could try to reproduce the problem. I'll keep you in touch

Regards,
Fabrice

On Thu, Feb 19, 2026 at 1:14 AM Robert Haas <robertmhaas(at)gmail(dot)com> wrote:

> On Wed, Feb 18, 2026 at 5:40 AM Fabrice Chapuis <fabrice636861(at)gmail(dot)com>
> wrote:
> > why walsummarizer works fine on the primary and it is stuck on the
> secondary?
>
> I don't know. It sounds like a bug, but I'm not exactly sure what the
> bug is. In the situation you describe here, it seems like the standby
> might have switched from timeline 6 to some newer timeline, most
> likely 7, but the WAL summarizer got stuck at the end of timeline 6
> instead of following the timeline change. If that were the
> explanation, then this would only happen when a new primary is
> promoted and a standby starts following it. It could either be the
> case that this happens every single time a standby changes timelines,
> or it could be that it only happens if the standby changes timelines
> and some other unknown condition is also satisfied.
>
> Alternatively, maybe there's some other triggering event altogether.
>
> Any ideas, based on your experience so far?
>
> --
> Robert Haas
> EDB: http://www.enterprisedb.com
>

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