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From: Andrey Borodin <[email protected]>
To: Kirill Reshke <[email protected]>
Cc: Melanie Plageman <[email protected]>
Cc: Alexander Lakhin <[email protected]>
Cc: Andres Freund <[email protected]>
Cc: Chao Li <[email protected]>
Cc: Xuneng Zhou <[email protected]>
Cc: Robert Haas <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Cc: Heikki Linnakangas <[email protected]>
Subject: Re: eliminate xl_heap_visible to reduce WAL (and eventually set VM on-access)
Date: Fri, 30 Jan 2026 16:09:34 +0500
Message-ID: <[email protected]> (raw)
In-Reply-To: <CALdSSPjnnXyJ3Ma6VTfYOT2KvOf_f6poMrPtAjNc5V2iFSE8Vw@mail.gmail.com>
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	<CALdSSPjnnXyJ3Ma6VTfYOT2KvOf_f6poMrPtAjNc5V2iFSE8Vw@mail.gmail.com>

Well, converting to TAP seems feasible to me. This will make test more stable.

> On 30 Jan 2026, at 14:59, Kirill Reshke <[email protected]> wrote:
> 
> I use 'autovacuum-worker-start' injection point to 'disable'
> autovacuum until test is done

If you just set autovacuum off - the test will be executed on bf animals that has no injection points.

Also
x4mmm@x4mmm-osx postgres % git am ~/Downloads/v1-0001-Reimplement-regression-tests-from-21796c267-as-TA.patch 
Applying: Reimplement regression tests from 21796c267 as TAP-test.
.git/rebase-apply/patch:148: trailing whitespace.
# Check that vacuum phase I does not need to modify the heap buffer.  warning: 1 line adds whitespace errors.

There are some typos: "flakky", "introduces", "actuvity", "actaully", "hilding".

Test descriptions are off: you used 'page_header returned as expected' when it's actually about pg_visibility_map_summary.

And, of course, total lack of comments is not good.

However, in principle approach seems good to me.


(FWIW I'm looking into patches 0003-0005 of v33, I'll post when I'll find some nits)


Best regards, Andrey Borodin.





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