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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Nathan Bossart <nathandbossart@gmail.com>
Cc: Andres Freund <andres@anarazel.de>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: pgsql-hackers@postgresql.org
Cc: schneider@ardentperf.com
Subject: Re: monitoring usage count distribution
Date: Wed, 05 Apr 2023 16:16:24 -0400
Message-ID: <2061855.1680725784@sss.pgh.pa.us> (raw)
In-Reply-To: <20230405194101.GB105962@nathanxps13>
References: <20230130233040.GA2800702@nathanxps13>
	<CA+Tgmoa-c3avHFBdko9d7bGQuYXrJhHHjhG1yAs8h-k_sLbyPQ@mail.gmail.com>
	<20230404232919.uibzbhjdylk3mlvp@awork3.anarazel.de>
	<CA+TgmobrQ90KGN4dwxL8q-LV529gCMmzXiy8CG5eQwjYTPzZLA@mail.gmail.com>
	<20230405175124.GA31516@nathanxps13>
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	<20230405190921.ck7v4y2h3ogoanvg@awork3.anarazel.de>
	<20230405194101.GB105962@nathanxps13>

Nathan Bossart <nathandbossart@gmail.com> writes:
> On Wed, Apr 05, 2023 at 12:09:21PM -0700, Andres Freund wrote:
>> I would not mind having a separate function returning 6 rows, if we really
>> want that, but making pg_buffercache_summary() return 6 rows would imo make it
>> less useful for getting a quick overview. At least I am not that quick summing
>> up multple rows, just to get a quick overview over the number of dirty rows.

> This is what v1-0001 does.  We could probably make pg_buffercache_summary a
> view on pg_buffercache_usage_counts, too, but that doesn't strike me as
> tremendously important.

Having two functions doesn't seem unreasonable to me either.
Robert spoke against it to start with, does he still want to
advocate for that?

			regards, tom lane





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