[EMAIL PROTECTED] (Richard Jones) writes: > I have some new hardware on the way and would like some advice on > how to get the most out of it.. > > its a dual xeon 2.4, 4gb ram and 3x identical 15k rpm scsi disks > > should i mirror 2 of the disks for postgres data, and use the 3rd > disk for the o/s and the pg logs or raid5 the 3 disks or even stripe > 2 disks for pg and use the 3rd for o/s,logs,backups ? > > the machine will be dealing with lots of inserts, basically as many > as we can throw at it
Having WAL on a separate drive from the database would be something of a win. I'd buy that 1 disk for OS+WAL and then RAID [something] across the other two drives for the database would be pretty helpful. After doing some [loose] benchmarking, the VERY best way to improve performance would involve a RAID controller with battery-backed cache. On a box with similar configuration to yours, it took ~3h for a particular set of data to load; on another one with battery-backed cache (and a dozen fast SCSI drives :-)), the same data took as little as 6 minutes to load. The BIG effect seemed to come from the controller. -- (reverse (concatenate 'string "ofni.smrytrebil" "@" "enworbbc")) <http://dev6.int.libertyrms.com/> Christopher Browne (416) 646 3304 x124 (land) ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster
