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From: Melanie Plageman <melanieplageman@gmail.com>
Date: Tue, 21 Apr 2026 17:37:13 -0400
Message-ID: 
 <CAAKRu_aS3e7-Q+9mO5M5W8_pw-rcAgDHuNzykUSrcHw2JTh74g@mail.gmail.com>
Subject: Re: eliminate xl_heap_visible to reduce WAL (and eventually set VM
 on-access)
To: Alexander Lakhin <exclusion@gmail.com>
Cc: Andres Freund <andres@anarazel.de>, 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 12:18=E2=80=AFPM Melanie Plageman
<melanieplageman@gmail.com> wrote:
>
>
> Yes, I think changing it to a temp table is the easiest fix. We could
> also do autovacuum_enabled=3Dfalse, I think, but making it a temp table
> seems cleanest.
>
> I wonder if we should move the EXPLAIN test above the results queries,
> then throw in a vacuum in between some of them so we exercise btree
> gist as a bitmap heap scan and as an index only scan. It could provide
> a little bit more coverage? Or maybe that isn't actually extra
> coverage. I'm not sure.

I kept it simple and just committed making it a temp table in 62407d26b7c

- Melanie