On 02/14/2013 08:47 PM, Scott Marlowe wrote:
> If you run your benchmarks for more than a few minutes I highly
> recommend enabling sysstat service data collection, then you can look
> at it after the fact with sar. VERY useful stuff both for
> benchmarking and post mortem on live servers.
Well, background sar, by default on Linux, only collects every 30min.
For a benchmark run, you want to generate your own sar file, for example:
sar -o hddrun2.sar -A 10 90 &
which says "collect all stats every 10 seconds and write them to the
file hddrun2.sar for 15 minutes"
--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com
