On Tue, Mar 7, 2017 at 10:07 PM, Robert Haas <robertmh...@gmail.com> wrote: > It's not about speed. It's about not forgetting to prefetch. Suppose > that worker 1 becomes the prefetch worker but then doesn't return to > the Bitmap Heap Scan node for a long time because it's busy in some > other part of the plan tree. Now you just stop prefetching; that's > bad. You want prefetching to continue regardless of which workers are > busy doing what; as long as SOME worker is executing the parallel > bitmap heap scan, prefetching should continue as needed.
Right, I missed this part. I will fix this. -- Regards, Dilip Kumar EnterpriseDB: http://www.enterprisedb.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
