On Thu, Jun 15, 2017 at 5:16 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: > Robert Haas <robertmh...@gmail.com> writes: >> On Thu, Jun 15, 2017 at 5:06 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: >>> ... nodeGather cannot deem the query done until it's seen EOF on >>> each tuple queue, which it cannot see until each worker has attached >>> to and then detached from the associated shm_mq. > >> Oh. That's sad. It definitely has to wait for any tuple queues that >> have been attached to be detached, but it would be better if it didn't >> have to wait for processes that haven't even attached yet. > > Hm. We assume they attach before they start taking any of the query > work? Seems reasonable, and this would give us some chance of recovering > from worker fork failure.
Yeah, something like that. I'm not sure exactly how to implement it, though. I think I intended for it to work that way all along, but the code's not there. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
