Re: MultiXact\SLRU buffers configuration - Mailing list pgsql-hackers

From Andrey M. Borodin
Subject Re: MultiXact\SLRU buffers configuration
Date
Msg-id 5C635AA6-A836-466A-9C5D-44CAA86B29E3@yandex-team.ru
Whole thread Raw
In response to Re: MultiXact\SLRU buffers configuration  (Alvaro Herrera <alvherre@alvh.no-ip.org>)
List pgsql-hackers

> On 7 Apr 2024, at 21:41, Alvaro Herrera <alvherre@alvh.no-ip.org> wrote:
>
> Well, it would be nice to have *some* test, but as you say it is way
> more complex than the thing being tested, and it zooms in on the
> functioning of the multixact creation in insane quantum-physics ways ...
> to the point that you can no longer trust that multixact works the same
> way with the test than without it.  So what I did is manually run other
> tests (pgbench) to verify that the corner case in multixact creation is
> being handled correctly, and pushed the patch after a few corrections,
> in particular so that it would follow the CV sleeping protocol a little
> more closely to what the CV documentation suggests, which is not at all
> what the patch did.  I also fixed a few comments that had been neglected
> and changed the name and description of the CV in the docs.

That's excellent! Thank you!

> Now, maybe we can still add the test later, but it needs a rebase.

Sure. 'wait' injection points are there already, so I'll produce patch with "prepared" injection points and
re-implementtest on top of that. I'll put it on July CF. 


Best regards, Andrey Borodin.


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