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From: Tom Lane <[email protected]>
To: Andres Freund <[email protected]>
Cc: Jelte Fennema-Nio <[email protected]>
Cc: torikoshia <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Bruce Momjian <[email protected]>
Subject: Re: RFC: Allow EXPLAIN to Output Page Fault Information
Date: Sun, 09 Feb 2025 13:05:42 -0500
Message-ID: <[email protected]> (raw)
In-Reply-To: <myw76agwrlmisvamwbfl6ibxgwh5glzitydiwnfmtb5aui232i@274yxxtnbnsp>
References: <[email protected]>
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	<myw76agwrlmisvamwbfl6ibxgwh5glzitydiwnfmtb5aui232i@274yxxtnbnsp>

Andres Freund <[email protected]> writes:
> I'm somewhat against this patch, as it's fairly fundamentally incompatible
> with AIO. There's no real way to get information in this manner if the IO
> isn't executed synchronously in process context...

Even without looking ahead to AIO, there's bgwriter, walwriter, and
checkpointer processes that all take I/O load away from foreground
processes.  I don't really believe that this will produce useful
numbers.

			regards, tom lane

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