Re: Nonrandom scanned_pages distorts pg_class.reltuples set by VACUUM

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От Justin Pryzby
Тема Re: Nonrandom scanned_pages distorts pg_class.reltuples set by VACUUM
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Msg-id 20220217134606.GJ31460@telsasoft.com
обсуждение исходный текст
Ответ на Re: Nonrandom scanned_pages distorts pg_class.reltuples set by VACUUM  (Peter Geoghegan <pg@bowt.ie>)
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On Wed, Feb 16, 2022 at 07:43:09PM -0800, Peter Geoghegan wrote:
> > I also have a hard time making heads or tails out of the commit message of
> > 44fa84881ff. It's quite long without being particularly descriptive. The
> > commit just changes a lot of things at once, making it hard to precisely
> > describe and very hard to review and understand.
> 
> The commit message is high level. The important point is that we can
> more or less treat all scanned_pages the same, without generally
> caring about whether or not a cleanup lock could be acquired (since
> the exceptions where that isn't quite true are narrow and rare). That
> is the common theme, for everything.

As for myself, I particularly appreciated the clarity and detail of this commit
message.  (I have looked at the associated change a bit, but not deeply).

Thanks,
-- 
Justin



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