On Tue, 31 Mar 2009, Chris.Ellis@shropshire.gov.uk wrote:
> Been having interesting times with an IBM x3650 with 8 15k RPM 73GB
> drives in RAID 10 and a ServRAID 8K controller with Write-Back cache
> enabled (battery installed and working). Currently getting a pgbench
> score of 4.7 transactions per second!
pgbench is a very high level test of your system. It can tell you when a
system is doing well, but it's almost useless for figuring out what's
wrong if there's a problem.
You shouldn't run pgbench until you've first done a lower-level benchmark
such as bonnie++ on the hardware. That should give you a better idea
what's going on here, and if the badness shows up there it will be much
easier to get someone at IBM to pay attention too.
--
* Greg Smith gsmith@gregsmith.com http://www.gregsmith.com Baltimore, MD