On Tue, Apr 28, 2009 at 5:58 PM, Scott Carey <scott@xxxxxxxxxxxxxxxxx> wrote: > 1. If everything is on the same partition/file system, fsyncs from the > xlogs may cross-pollute to the data. Ext3 is notorious for this, though > data=writeback limits the effect you especially might not want > data=writeback on your OS partition. I would recommend that the OS, Data, > and xlogs + etc live on three different partitions regardless of the number > of logical RAID volumes. Note that I remember reading some comments a while back that just having a different file system, on the same logical set, makes things faster. I.e. a partition for OS, one for xlog and one for pgdata on the same large logical volume was noticeably faster than having it all on the same big partition on a single logical volume. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
