On Tue, May 31, 2016 at 10:10 AM, Josh berkus <josh@agliodbs.com> wrote:
> "max_parallel_degree is the amount of parallelism in the query, with the
> understanding that the original parent process counts as 1, which means
> that if you set it to 1 you get no parallelism, and if you want 4
> parallel workers you need to set it to 5."
>
> Which one of those is going to require more explanations on -general and
> -novice? Bets?
>
> Let's not be complicated for the sake of being complicated.
But the distinction between parallel workers and backends that can
participate in parallel query does need to be user-visible. Worker
processes are a commodity (i.e. the user must consider
max_worker_processes).
--
Peter Geoghegan