On Wed, Mar 16, 2016 at 2:25 AM, Constantin S. Pan <kva...@gmail.com> wrote: > The backend just waits for the results from the workers and merges them > (in case wnum > 0). So the 1-worker configuration should never be used, > because it is as sequential as the 0-worker, but adds data transfer.
This is why I wanted an easy way of atomically guaranteeing some number of workers (typically 2), or not using parallelism at all. I think the parallel worker API should offer a simple way to do that in cases like this, where having only 1 worker is never going to win. -- Peter Geoghegan -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
