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From: Melanie Plageman <melanieplageman@gmail.com>
Date: Tue, 21 Apr 2026 11:07:25 -0400
Message-ID: 
 <CAAKRu_Y9N44j7SFyEkymTjosfCGZVetraVciAOq0wSRswvxQZg@mail.gmail.com>
Subject: Re: eliminate xl_heap_visible to reduce WAL (and eventually set VM
 on-access)
To: Andres Freund <andres@anarazel.de>
Cc: Alexander Lakhin <exclusion@gmail.com>, Tomas Vondra <tomas@vondra.me>,
	David Rowley <dgrowleyml@gmail.com>, Kirill Reshke <reshkekirill@gmail.com>,
	Chao Li <li.evan.chao@gmail.com>, Andrey Borodin <x4mmm@yandex-team.ru>,
	Xuneng Zhou <xunengzhou@gmail.com>, Robert Haas <robertmhaas@gmail.com>,
	PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>,
 Heikki Linnakangas <hlinnaka@iki.fi>
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On Mon, Apr 20, 2026 at 11:48=E2=80=AFAM Melanie Plageman
<melanieplageman@gmail.com> wrote:
>
> With shared buffers, while it is true you'd ideally leave the backend
> headroom for other read streams etc, it won't error out the way the
> temp table case does unless we've actually pinned all shared buffers.
> It will simply slow down the read ahead of the competing read streams.
>
> Attached is what I'm thinking of committing.

Okay, I committed this in da6874635db.

- Melanie