On Sat, Aug 25, 2012 at 6:59 AM, Scott Marlowe <scott.marlowe@xxxxxxxxx> wrote: > On Sat, Aug 25, 2012 at 6:53 AM, Felix Schubert <input@xxxxxxxxx> wrote: >> Hi Scott, >> >> the controller is a HP i410 running 3x300GB SAS 15K / Raid 5 > > Well it sounds like it does NOT have a battery back caching module on > it, am I right? Also what software did you use to benchmark your drive subsystem? Bonnie++ is a good place to start. There are better suites out there but it's been a while for me since I've used them. Also note the HP i410 is not the fastest RAID controller ever, but it should be faster than this if it has a battery backed cache on it which will allow write-back operation. Without it the controller will default to write-through, which is much slower. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
