Hi Luke, That is ~ 50% increase !! Amazing... How many reader processes did you have to get this results ? Regards. Milen -----Original Message----- From: pgsql-performance-owner@xxxxxxxxxxxxxx [mailto:pgsql-performance-owner@xxxxxxxxxxxxxx] On Behalf Of Luke Lonergan Sent: Thursday, August 03, 2006 6:05 AM To: Michael Stone; pgsql-performance@xxxxxxxxxxxxxx Subject: Re: [PERFORM] XFS filessystem for Datawarehousing Again - the performance difference increases as the disk speed increases. Our experience is that we went from 300MB/s to 475MB/s when moving from ext3 to xfs. - Luke On 8/2/06 4:33 PM, "Michael Stone" <mstone+postgres@xxxxxxxxx> wrote: > On Wed, Aug 02, 2006 at 02:26:39PM -0700, Steve Poe wrote: >> For the past year, I have been running odbc-bench on a dual-opteron >> with 4GB of RAM using a 8GB sample data. I found the performance >> difference between EXT3, JFS, and XFS is +/- 5-8%. > > That's not surprising when your db is only 2x your RAM. You'll find > that filesystem performance is much more important when your database > is 10x+ your RAM (which is often the case once your database heads > toward a TB). > >> Testing newer kernels and read-ahead patches may benefit you as well. > > I've been really impressed by the adaptive readahead patches with > postgres. > > Mike Stone > > ---------------------------(end of > broadcast)--------------------------- > TIP 6: explain analyze is your friend > ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings
