Baptiste LHOSTE wrote: >> Please show us the output from running this query: >> >> http://wiki.postgresql.org/wiki/Server_Configuration > [very reasonable settings except for a very large work_mem] Make sure that work_mem setting isn't driving you into swapping or near-zero caching. A shortage of cache space could explain this because it looks like about 8.5 ms for each page read. About the only other thing I can think to recommend is to decrease autovacuum_cost_delay to 10ms and see if that helps. > These tables have two timestamp columns and a btree index on both > timestamp column. Will it be more efficient for us to configure the > autovacuum daemon analyze task only on those columns ? No. > 4 * 300 Go Raid 0 You do realize that if any of those four drives fail you will need to use your backup, right? -Kevin -- Sent via pgsql-admin mailing list (pgsql-admin@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin