Thread: auto vacuum
Hi All - We run both postgres 8.2.3 and 8.4.1 in unix environment. We have auto vacuum configured and I am trying to find out its effectiveness. Here are a couple of questions: 1) I'm running a query that compares actual table count with the pg_stat table count ( pg_stat_user_tables.n_live_tup) to make sure there is not a huge difference between two. If the difference is small or within the analyze threshold I know vacuum analyze is running and doing its work. I am seeing that truncate does not trigger autovacuum analayze like delete does and pg_stat_user_tables.n_live_tup is not updated ( please correct me If I am wrong). Does it mean I have to run analyze manually whenever I truncate a table or system has a way of tracking. 2) In postgres 8.2 pg_stat_user_tables.n_live_tup field is missing. Is there a way to get table counts as the system sees it in 8.2? Thanks. Dinesh