From: Petr Jelinek <petr@2ndquadrant.com>
To: David G. Johnston <david.g.johnston@gmail.com>
Cc: Jim Nasby <Jim.Nasby@bluetreble.com>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: Josh berkus <josh@agliodbs.com>
Cc: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Cc: Peter Geoghegan <pg@heroku.com>
Cc: Noah Misch <noah@leadboat.com>
Cc: David Rowley <david.rowley@2ndquadrant.com>
Cc: Amit Kapila <amit.kapila16@gmail.com>
Cc: Magnus Hagander <magnus@hagander.net>
Cc: Bruce Momjian <bruce@momjian.us>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Subject: Re: Rename max_parallel_degree?
Date: Fri, 3 Jun 2016 06:21:08 +0200
Message-ID: <575105B4.60506@2ndquadrant.com> (raw)
In-Reply-To: <CAKFQuwaky0NtdjOkU7mp1n=-WREcL6n2PKT28cTQzV7gNPWjbQ@mail.gmail.com>
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On 01/06/16 17:55, David G. Johnston wrote:
> On Wed, Jun 1, 2016 at 11:45 AM, Petr Jelinek <petr@2ndquadrant.com
> <mailto:petr@2ndquadrant.com>>wrote:
>
> That GUC also controls worker processes that are started by
> extensions, not just ones that parallel query starts. This is btw
> one thing I don't like at all about how the current limits work, the
> parallel query will fight for workers with extensions because they
> share the same limit.
>
>
> ​Given that this models reality the GUC is doing its job. Now, maybe we
> need additional knobs to give the end-user the ability to influence how
> those fights will turn out.
Agreed, my point is that I think we do need additional knob.
--
Petr Jelinek http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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Subject: Re: Rename max_parallel_degree?
In-Reply-To: <575105B4.60506@2ndquadrant.com>
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