On Thu, Feb 16, 2017 at 11:11 AM, Robert Haas <robertmh...@gmail.com> wrote: > I do think that's worrying, but on the other hand it seems like this > solution could disable many hash joins that would actually be fine. I > don't think the largest ndistinct estimates we ever generate are very > large, and therefore this seems highly prone to worry even when > worrying isn't really justified.
+1. ndistinct has a general tendency to be wrong, owing to how ANALYZE works, which we see problems with from time to time. -- 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
