On Tue, Mar 28, 2017 at 3:59 PM, Aleksander Alekseev <a.aleks...@postgrespro.ru> wrote: > Hi, Robert. > >> I'm a little worried that this will be noticeably slower when the >> number of partitions is small, like 4 or 8 or 16. In other places, >> we've found it necessary to support both a list-based strategy and a >> hash-based strategy to avoid regressing small cases (e.g. >> join_rel_list + join_rel_hash in PlannerInfo, ResourceArray in >> resowner.c, etc). > > I've checked it [1]. Apparently in this particular case patches make code > faster on small amount of partitions as well.
Huh. Well, in that case, cool. -- 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
