> My guess is this is checkpoint related. I'll assume "checkpoint" is a PG term that I'm not yet familiar with - will query my DBA :-) If this OS buffer cache, wouldn't that be cached an awfully long time? i.e. we're in big trouble if we get a bad crash? -- “Don't eat anything you've ever seen advertised on TV” - Michael Pollan, author of "In Defense of Food" -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance