From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Magnus Hagander <magnus@hagander.net>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: Bruce Momjian <bruce@momjian.us>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Subject: Re: Rename max_parallel_degree?
Date: Mon, 25 Apr 2016 15:58:04 -0300
Message-ID: <20160425185804.GA415608@alvherre.pgsql> (raw)
In-Reply-To: <2219.1461523373@sss.pgh.pa.us>
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Tom Lane wrote:
> Magnus Hagander <magnus@hagander.net> writes:
> > On Sun, Apr 24, 2016 at 8:23 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> >> FWIW, I agree with Bruce that using "degree" here is a poor choice.
> >> It's an unnecessary dependence on technical terminology that many people
> >> will not be familiar with.
>
> > FWIW, SQL Server calls it "degree of parallelism" as well (
> > https://technet.microsoft.com/en-us/library/ms188611(v=sql.105).aspx). And
> > their configuration option is "max degree of parallelism":
> > https://technet.microsoft.com/en-us/library/ms181007(v=sql.105).aspx.
>
> Yes, but both they and Oracle appear to consider "degree" to mean the
> total number of processors used, not the number of secondary jobs in
> addition to the main one. The only thing worse than employing obscure
> technical terminology is employing it incorrectly:
What about calling it something even simpler, such as "max_parallelism"?
This avoids such cargo cult, and there's no implication that it's
per-query.
--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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Cc: alvherre@2ndquadrant.com, tgl@sss.pgh.pa.us, magnus@hagander.net, robertmhaas@gmail.com, bruce@momjian.us
Subject: Re: Rename max_parallel_degree?
In-Reply-To: <20160425185804.GA415608@alvherre.pgsql>
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