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From: David G. Johnston <[email protected]>
To: Peter Eisentraut <[email protected]>
Cc: [email protected] <[email protected]>
Subject: max_worker_processes default not documented
Date: Thu, 12 May 2016 06:24:36 -0700
Message-ID: <CAKFQuwYsb-Wxd9=6xsDxOLWXmWnNL-9C4bmmoVPJPmnGBgsHyg@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <CAKFQuwYdW=LLWnzvpzB6D5RB2RpO6u5LcGyvmuR-=CbVzR69xg@mail.gmail.com>
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On Thursday, May 12, 2016, Peter Eisentraut <
[email protected]
<javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote:

> On 5/7/16 11:16 PM, David G. Johnston wrote:
>
>> While this may be in the postgresql.conf it's absence in the docs is made
>> noticeable by the fact both the immediately preceding and subsequent items
>> in the 9.6 docs specify their default values.  Furthermore,
>> max_parallel_degree defaults to 2 but the workers come from the pool sized
>> using max_worker_processes - provoking the very question as to how many is
>> 2 relative to the default pool size.
>>
>
> done
>
>
 Thanks.  Now for a related question.  Are any of those workers permanently
in use?  And what processes use them.  I can think of checkpoint writer and
autovacuum off the top of my head that are potential candidates.

David J.


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