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help / color / mirror / Atom feedFrom: Daniel Gustafsson <[email protected]>
To: Melanie Plageman <[email protected]>
Cc: Robert Haas <[email protected]>
Cc: Andres Freund <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: Masahiko Sawada <[email protected]>
Cc: Kyotaro Horiguchi <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Cc: Amit Kapila <[email protected]>
Subject: Re: Should vacuum process config file reload more often
Date: Fri, 7 Apr 2023 01:08:09 +0200
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAAKRu_Znk6WCCQqEw8hv3+X1Fm8gG0x4KKRAkKmO2JOcA-77-g@mail.gmail.com>
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> On 7 Apr 2023, at 00:12, Melanie Plageman <[email protected]> wrote:
>
> On Thu, Apr 6, 2023 at 5:45 PM Daniel Gustafsson <[email protected]> wrote:
>>
>>> On 6 Apr 2023, at 23:06, Melanie Plageman <[email protected]> wrote:
>>
>>> Autovacuum workers, at the end of VacuumUpdateCosts(), check if cost
>>> limit or cost delay have been changed. If they have, they assert that
>>> they don't already hold the AutovacuumLock, take it in shared mode, and
>>> do the logging.
>>
>> Another idea would be to copy the values to local temp variables while holding
>> the lock, and release the lock before calling elog() to avoid holding the lock
>> over potential IO.
>
> Good idea. I've done this in attached v19.
> Also I looked through the docs and everything still looks correct for
> balancing algo.
I had another read-through and test-through of this version, and have applied
it with some minor changes to comments and whitespace. Thanks for the quick
turnaround times on reviews in this thread!
I opted for keeping the three individual commits, squashing them didn't seem
helpful enough to future commitlog readers and no other combination of the
three made more sense than what has been in the thread.
--
Daniel Gustafsson
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