Re: Rename max_parallel_degree?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Josh berkus <josh(at)agliodbs(dot)com>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Noah Misch <noah(at)leadboat(dot)com>, David Rowley <david(dot)rowley(at)2ndquadrant(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Magnus Hagander <magnus(at)hagander(dot)net>, Bruce Momjian <bruce(at)momjian(dot)us>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Rename max_parallel_degree?
Date: 2016-05-31 17:03:21
Message-ID: 8716.1464714201@sss.pgh.pa.us
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Josh berkus <josh(at)agliodbs(dot)com> writes:
> I realize there's a lot of water under the bridge here, but I think
> we're going to get 1000 questions on -general of the type: "I asked for
> 8 parallel workers, why did I only get 7?". I believe we will regret
> this change.
> So, one vote from me to revert.

Well, that gets back to the question of whether average users will
understand the "degree" terminology. For the record, while I do not
like the current behavior either, this was not the solution I favored.
I thought we should rename the GUC and keep it as meaning the number
of additional worker processes.

regards, tom lane

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