Ben Hoyt <benhoyt@xxxxxxxxx> writes: >> It appears the possible explanations for Ben's problem are: >> 1. For some reason this query is a lot slower than the one he came up >> with; > Anyway, it's definitely #1 that's happening, as I build the > RI_Initial_Check() query by hand, and it takes just as long as the ADD > CONSTRAINT. Huh. Maybe an optimizer failing? Could we see the full text of both queries and EXPLAIN ANALYZE results for them? > So I guess this is really a side effect of the quirky way we're > dumping and restoring only one schema, and dropping/re-adding > constraints on deployment because of this. Is this a really strange > thing to do -- deploying only one schema (the "static" data) and > dropping/re-adding constraints -- or are there better practices here? Doesn't seem unreasonable. One thought is that maybe you need to insert a manual ANALYZE after reloading the data? regards, tom lane -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
