On Tue, Apr 8, 2014 at 02:00:05PM +0000, Shaun Thomas wrote: > So if you are on a 1GB RAID card, set it to 1GB. Once you have 1GB > of dirty memory (from a checkpoint or whatever), Linux will begin > flushing. > > This is a pretty well-known issue on Linux systems with large amounts > of RAM. Most VM servers fit that profile, so I'm not surprised it's > hurting you. Agreed. The dirty kernel defaults Linux defaults are too high for systems with large amounts of memory. See sysclt -a | grep dirty for a list. -- Bruce Momjian <bruce@xxxxxxxxxx> http://momjian.us EnterpriseDB http://enterprisedb.com + Everyone has their own god. + -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
