Re: logtape.c stats don't account for unused "prefetched" block numbers

From: Peter Geoghegan <pg(at)bowt(dot)ie>
To: Jeff Davis <pgsql(at)j-davis(dot)com>
Cc: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: logtape.c stats don't account for unused "prefetched" block numbers
Date: 2020-09-15 18:33:00
Message-ID: CAH2-WzkHhaANmvcnyPzQnEqQNbrjU8bAMtkHhJs8v6RJokwvTg@mail.gmail.com
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On Mon, Sep 14, 2020 at 11:44 PM Jeff Davis <pgsql(at)j-davis(dot)com> wrote:
> Attached. HashAgg seems to accurately reflect the filesize, as does
> Sort.

For the avoidance of doubt: I think that this is the right way to go,
and that it should be committed shortly, before we stamp 13.0. The
same goes for hashagg-release-write-buffers.patch.

Thanks
--
Peter Geoghegan

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