From: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
---|---|
To: | Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> |
Cc: | Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, "Drouvot, Bertrand" <bdrouvot(at)amazon(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, "Oh, Mike" <minsoo(at)amazon(dot)com> |
Subject: | Re: [BUG] Logical replication failure "ERROR: could not map filenode "base/13237/442428" to relation OID" with catalog modifying txns |
Date: | 2022-07-12 06:25:47 |
Message-ID: | CAA4eK1KZHnHhZdL1-Fa-6+sw4JHEPjLjZ=+wTwRHnkooXoxp2A@mail.gmail.com |
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On Tue, Jul 12, 2022 at 11:38 AM Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> wrote:
>
> On Tue, Jul 12, 2022 at 10:28 AM Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> wrote:
> >
> >
> > I'm doing benchmark tests and will share the results.
> >
>
> I've done benchmark tests to measure the overhead introduced by doing
> bsearch() every time when decoding a commit record. I've simulated a
> very intensified situation where we decode 1M commit records while
> keeping builder->catchange.xip array but the overhead is negilible:
>
> HEAD: 584 ms
> Patched: 614 ms
>
> I've attached the benchmark script I used. With increasing
> LOG_SNAPSHOT_INTERVAL_MS to 90000, the last decoding by
> pg_logicla_slot_get_changes() decodes 1M commit records while keeping
> catalog modifying transactions.
>
Thanks for the test. We should also see how it performs when (a) we
don't change LOG_SNAPSHOT_INTERVAL_MS, and (b) we have more DDL xacts
so that the array to search is somewhat bigger
--
With Regards,
Amit Kapila.
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