On Thu, Aug 21, 2008 at 07:06:32PM +0200, Ivan Sergio Borgonovo wrote: > I've a large table with a pk and several smaller tables with fk > referencing to it. > > deleting from the first table is very slow. > > Not all the related fk have indexes but they are VERY small (0 to > 100 records) while the main table contain 600-800K records. > > the > explain delete p; > doesn't give any clue. > > Any hint to track down the problem? BEGIN; EXPLAIN ANALYZE DELETE ... ROLLBACK; Lack of indexes on the referencing tables might be an issue, as might any triggers. Cheers, David. -- David Fetter <david@xxxxxxxxxx> http://fetter.org/ Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter Skype: davidfetter XMPP: david.fetter@xxxxxxxxx Remember to vote! Consider donating to Postgres: http://www.postgresql.org/about/donate
