Re: Rename max_parallel_degree?
Joshua D. Drake <jd@commandprompt.com>
From: "Joshua D. Drake" <jd@commandprompt.com>
To: Josh berkus <josh@agliodbs.com>, Tom Lane <tgl@sss.pgh.pa.us>
Cc: Robert Haas <robertmhaas@gmail.com>, Noah Misch <noah@leadboat.com>,
David Rowley <david.rowley@2ndquadrant.com>,
Amit Kapila <amit.kapila16@gmail.com>,
Alvaro Herrera <alvherre@2ndquadrant.com>,
Magnus Hagander <magnus@hagander.net>, Bruce Momjian <bruce@momjian.us>,
PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2016-05-31T17:14:17Z
Lists: pgsql-hackers
On 05/31/2016 10:10 AM, Josh berkus wrote:
> Compare this:
>
> "max_parallel is the maximum number of parallel workers which will work
> on each stage of the query which is parallizable. If you set it to 4,
> you get up to 4 workers."
>
> with this:
>
> "max_parallel_degree is the amount of parallelism in the query, with the
> understanding that the original parent process counts as 1, which means
> that if you set it to 1 you get no parallelism, and if you want 4
> parallel workers you need to set it to 5."
>
> Which one of those is going to require more explanations on -general and
> -novice? Bets?
>
> Let's not be complicated for the sake of being complicated.
>
+1
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