> -----Original Message----- > From: Greg Smith [mailto:greg@xxxxxxxxxxxxxxx] > Sent: Monday, August 08, 2011 9:42 PM > To: mark > Cc: pgsql-performance@xxxxxxxxxxxxxx > Subject: Re: benchmark woes and XFS options > > I think your notion that you have an HP CCISS driver in this older > kernel that just doesn't drive your card very fast is worth exploring. > What I sometimes do in the situation you're in is boot a Linux > distribution that comes with a decent live CD, such as Debian or > Ubuntu. Just mount the suspect drive, punch up read-ahead, and re-test > performance. That should work well enough to do a simple dd test, and > probably well enough to compile and run bonnie++ too. If that gives > good performance numbers, it should narrow the list of possible causes > considerably. You really need to separate out "bad driver" from the > other possibilities here given what you've described, and that's a low > impact way to do it. > > -- > Greg Smith 2ndQuadrant US greg@xxxxxxxxxxxxxxx Baltimore, MD > PostgreSQL Training, Services, and 24x7 Support www.2ndQuadrant.us Thanks Greg. I will try and give HPSA a whirl and report back. Both with single disk and the whole raid set. I am out of the office this week so I might have some delay before I can do some more detective work. I don't think I have any gear that won't require either the CCISS or HPSA driver and in SFF drives. But will try and look around. -Mark -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
