| From: | "Matheus Alcantara" <matheusssilv97(at)gmail(dot)com> |
|---|---|
| To: | "Rishu Bagga" <rishu(dot)postgres(at)gmail(dot)com>, "Arseniy Mukhin" <arseniy(dot)mukhin(dot)dev(at)gmail(dot)com> |
| Cc: | "Yura Sokolov" <y(dot)sokolov(at)postgrespro(dot)ru>, "Masahiko Sawada" <sawada(dot)mshk(at)gmail(dot)com>, "Daniil Davydov" <3danissimo(at)gmail(dot)com>, Álvaro Herrera <alvherre(at)kurilemu(dot)de>, "Alexandra Wang" <alexandra(dot)wang(dot)oss(at)gmail(dot)com>, "PostgreSQL Hackers" <pgsql-hackers(at)postgresql(dot)org>, "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Joel Jacobson" <joel(at)compiler(dot)org> |
| Subject: | Re: LISTEN/NOTIFY bug: VACUUM sets frozenxid past a xid in async queue |
| Date: | 2025-09-05 10:45:32 |
| Message-ID: | DCKT0VWL4B34.N09V46RR5QV9@gmail.com |
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| Lists: | pgsql-hackers |
On Thu Sep 4, 2025 at 8:02 PM -03, Rishu Bagga wrote:
> On Thu, Sep 4, 2025 at 7:14 AM Arseniy Mukhin
> <arseniy(dot)mukhin(dot)dev(at)gmail(dot)com> wrote:
>
>> Interesting, have you shared your patch and results somewhere? IIUC
>> Tom's approach resolves this bug, because with it we have queue
>> entries produced by committed transactions only, so we don't need to
>> check their status and don't have dependency on clog.
>
> I was eventually able to get better numbers with the patch after using
> a substantial number of connections, so I have now posted it here. [1].
>
Thanks for sharing the patch! I'll reserve some time to test and review.
--
Matheus Alcantara
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