On Sun, Apr 24, 2016 at 8:23 PM, Tom Lane <t...@sss.pgh.pa.us> wrote:

> Robert Haas <robertmh...@gmail.com> writes:
> > On Sat, Apr 23, 2016 at 11:58 PM, Bruce Momjian <br...@momjian.us>
> wrote:
> >> Why is the parallelism variable called "max_parallel_degree"?  Is that a
> >> descriptive name?  What does "degree" mean?  Why is it not called
> >> "max_parallel_workers"?
> > Because "degree of parallelism" is standard terminology, I guess.
> 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":

Oracle also call it "degree of parallelism" (

So it's certainly not a made-up term. And I'd go as far as to say that most
people coming from other databases would be familiar with it. It may not be
a standard, but clearly it's very close to being that.

 Magnus Hagander
 Me: http://www.hagander.net/
 Work: http://www.redpill-linpro.com/

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