Thanks for the reply Tom, will try and construct test case. Have been unable to replicate in a simple test the sort of updates that the table out in the wild is seeing, so may impact that issue of vacuum finding unrepresentative sample, maybe. Will try harder! When you say recent releases, does that include 8.4? -- View this message in context: http://postgresql.1045698.n5.nabble.com/Statistics-mismatch-between-n-live-tup-and-actual-row-count-tp5059317p5735602.html Sent from the PostgreSQL - general mailing list archive at Nabble.com. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general