Re: pg_xmin_horizon: a system view of everything pinning the xmin horizon

From: solai v <solai(dot)cdac(at)gmail(dot)com>
To: Scott Ray <scott(at)scottray(dot)io>
Cc: PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: pg_xmin_horizon: a system view of everything pinning the xmin horizon
Date: 2026-08-11 04:26:07
Message-ID: CAF0whuc8+PAeLg+oTdQ1p95qGTv0SPNT9TDzayjNJva98pUjsg@mail.gmail.com
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Hi,

On Sun, Aug 9, 2026 at 8:46 AM Scott Ray <scott(at)scottray(dot)io> wrote:
>
> On Tuesday, August 4th, 2026 at 2:42 AM, solai v <solai(dot)cdac(at)gmail(dot)com> wrote:
>
> > The updated patch looks good to me.
>
> Thanks for the review and testing.
>
> Attached is v4. It changes documentation and comments only, so the
> code is identical to the v3 you tested. The leave-one-out recipe
> was too long and didn't handle database scoping properly, so I
> removed it. Also, I rewrote and trimmed some comments and
> documented two caveats, one about cross-row consistency and the
> other about aggregate slot xmin contribution. Patch v4 applies to
> master b5978350222.
>

This looks good.

Regards,
Solai

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