On Tue, May 1, 2012 at 9:44 AM, Walker, James Les <jawal...@cantor.com> wrote: > I installed the enterprisedb distribution and immediately saw a 400% > performance increase. Turning off fsck made it an order of magnitude better. > I'm now peaking at over 400 commits per second. Does that sound right?
yeah -- well it's hard to say but that sounds plausible based on what i know. it would be helpful to see the queries you're running to get apples to apples idea of what's going on. > If I understand what you're saying, then to sustain this high rate I'm going > to need a controller that can defer fsync requests from the host because it > has some sort of battery backup that guarantees the full write. yes -- historically, they way to get your tps rate up was to get a battery backed cache. this can give you burst (although not necessarily sustained) tps rates well above what the drive can handle. lately, a few of the better built ssd also have on board capacitors which provide a similar function and allow the drives to safely hit high tps rates as well. take a good look at the intel 320 and 710 drives. merlin -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
