Tom Lane <tgl@xxxxxxxxxxxxx> wrote: > However, you'd have to be spending a lot of time chasing through > long HOT chains before that would happen enough to make this a > hotspot... That makes it all the more mysterious, then. These tables are insert-only except for a weekly delete of one week of the oldest data. The parent table, with the date, is deleted first, then this table deletes "where not exists" a corresponding parent. I can't see how we'd ever have a HOT chain in these tables. Is there anything in particular you'd like me to check? -Kevin -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance