On Sat, Apr 23, 2016 at 8:58 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"?

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

Peter Geoghegan

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