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From: Tom Lane <tgl@sss.pgh.pa.us>
To: "Jehan-Guillaume (ioguix) de Rorthais" <ioguix@free.fr>
cc: Tumasgiu Rossini <rossini.t@gmail.com>,
        Mariel Cherkassky <mariel.cherkassky@gmail.com>,
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        pgsql-performance@lists.postgresql.org
Subject: Re: pgstattupple vs pg_total_relation_size
In-reply-to: <20190130142701.38992d60@firost>
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Comments: In-reply-to "Jehan-Guillaume (ioguix) de Rorthais" <ioguix@free.fr>
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"Jehan-Guillaume (ioguix) de Rorthais" <ioguix@free.fr> writes:
> On Wed, 30 Jan 2019 14:19:52 +0100
> Tumasgiu Rossini <rossini.t@gmail.com> wrote:
>> According to the doc [1],
>> pg_total_relation_size add toasted data *and* indexes to the mix.

> *and* FSM *and* VM.

Yeah.  In this particular case, the other page presumably belongs to the
toast table's index, which will have a metapage even if the table is
empty.

			regards, tom lane