From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Peter Geoghegan <pg@bowt.ie>
Cc: Jeff Davis <pgsql@j-davis.com>
Cc: David Rowley <dgrowleyml@gmail.com>
Cc: Stephen Frost <sfrost@snowman.net>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Andres Freund <andres@anarazel.de>
Cc: Bruce Momjian <bruce@momjian.us>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: Justin Pryzby <pryzby@telsasoft.com>
Cc: Melanie Plageman <melanieplageman@gmail.com>
Cc: Tomas Vondra <tomas.vondra@2ndquadrant.com>
Cc: pgsql-hackers@postgresql.org <pgsql-hackers@postgresql.org>
Subject: Re: Default setting for enable_hashagg_disk
Date: Mon, 27 Jul 2020 13:30:29 -0400
Message-ID: <20200727173029.GA25029@alvherre.pgsql> (raw)
In-Reply-To: <CAH2-Wz=YP4UcJwCLx51W47o95fh2nCYdFLtamv7nUmRch9+mrg@mail.gmail.com>
On 2020-Jul-23, Peter Geoghegan wrote:
> Attached is v3 of the hash_mem_multiplier patch series, which now has
> a preparatory patch that removes hashagg_avoid_disk_plan.
I notice you put the prototype for get_hash_mem in nodeHash.h. This
would be fine if not for the fact that optimizer needs to call the
function too, which means now optimizer have to include executor headers
-- not a great thing. I'd move the prototype elsewhere to avoid this,
and I think miscadmin.h is a decent place for the prototype, next to
work_mem and m_w_m. It remains strange to have the function in executor
implementation, but I don't offhand see a better place, so maybe it's
okay where it is.
Other than that admittedly trivial complaint, I found nothing to
complain about in this patch.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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To: pgsql-hackers@postgresql.org
Cc: alvherre@2ndquadrant.com, pg@bowt.ie, pgsql@j-davis.com, dgrowleyml@gmail.com, sfrost@snowman.net, tgl@sss.pgh.pa.us, andres@anarazel.de, bruce@momjian.us, robertmhaas@gmail.com, pryzby@telsasoft.com, melanieplageman@gmail.com, tomas.vondra@2ndquadrant.com
Subject: Re: Default setting for enable_hashagg_disk
In-Reply-To: <20200727173029.GA25029@alvherre.pgsql>
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