On Fri, Jan 6, 2017 at 10:43 AM, Andres Freund <and...@anarazel.de> wrote: > On 2016-12-16 09:34:31 -0800, Andres Freund wrote: >> > To fix his issue, we need something like your 0001. Are you going to >> > polish that up soon here? >> >> Yes. > > I've two versions of a fix for this. One of them basically increases the > "spread" of buckets when the density goes up too much. It does so by > basically shifting the bucket number to the left (e.g. only every second > bucket can be the "primary" bucket for a hash value). The other > basically just replaces the magic constants in my previous POC patch > with slightly better documented constants. For me the latter works just > as well as the former, even though aesthetically/theoretically the > former sounds better. I'm inclined to commit the latter, at least for > now.
Did you intend to attach the patches? -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers