Subject: Re: Rename max_parallel_degree?
To: "David G. Johnston" <david.g.johnston@gmail.com>
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Cc: Jim Nasby <Jim.Nasby@bluetreble.com>, Robert Haas
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 PostgreSQL-development <pgsql-hackers@postgresql.org>
From: Petr Jelinek <petr@2ndquadrant.com>
Message-ID: <575105B4.60506@2ndquadrant.com>
Date: Fri, 3 Jun 2016 06:21:08 +0200
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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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