> Sounds to me like your IO system is stalling on fsyncs or something > like that. On machines with plenty of IO cranking up completion > target usuall smooths things out. It certainly seems like it does. However, I can't demonstrate the issue using any simpler tool than pgbench ... even running four test_fsyncs in parallel didn't show any issues, nor do standard FS testing tools. -- Josh Berkus PostgreSQL Experts Inc. http://pgexperts.com -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
