Re: Rename max_parallel_degree?
Peter Geoghegan <pg@bowt.ie>
From: Peter Geoghegan <pg@bowt.ie>
To: Bruce Momjian <bruce@momjian.us>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2016-04-24T06:00:51Z
Lists: pgsql-hackers
On Sat, Apr 23, 2016 at 8:58 PM, Bruce Momjian <bruce@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"? I also think that "max_parallel_workers" works better. While certain other systems have a concept of a "maximum parallel degree", it is not the same. Those other systems disable parallelism altogether when "max parallel degree" is 1, whereas Postgres uses 1 parallel worker along with a leader process. And so, parallelism *will* still be used on Postgres. That's a pretty significant difference. -- Peter Geoghegan