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": https://technet.microsoft.com/en-us/library/ms181007(v=sql.105).aspx. Oracle also call it "degree of parallelism" ( https://docs.oracle.com/cd/E18283_01/server.112/e17110/initparams176.htm). 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/
