On Mon, Oct 22, 2012 at 12:49:49PM -0500, Shaun Thomas wrote: > Trust me, there's plenty. We have a DB that's 6x larger than RAM > that's currently experiencing 6000TPS, and according to iostat, > anywhere from 20-60% disk utilization that's mostly reads. Could it be related to zone_reclaim_mode? What is vm.zone_reclaim_mode set to? /marcus -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance