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help / color / mirror / Atom feedFrom: Michael Paquier <[email protected]>
To: Bertrand Drouvot <[email protected]>
Cc: Nazir Bilal Yavuz <[email protected]>
Cc: Alvaro Herrera <[email protected]>
Cc: Kyotaro Horiguchi <[email protected]>
Cc: [email protected]
Subject: Re: per backend I/O statistics[
Date: Mon, 25 Nov 2024 16:18:54 +0900
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
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On Mon, Nov 25, 2024 at 07:12:56AM +0000, Bertrand Drouvot wrote:
> Not sure here, could custom stats start incrementing before the database system
> is ready to accept connections?
In theory, that could be possible. Like pg_stat_io currently, I am
ready to assume that it likely won't matter much.
> The only cons that I can see is that we will not be able to merge the flush cb
> but I don't think that's a blocker (the flush are done in shared memory so the
> impact on performance should not be that much of an issue).
The backend and I/O stats could begin diverging as a result of a new
implementation detail, and the performance of the flushes don't worry
me knowing at which frequency they happen on a live system.
--
Michael
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