On Fri, Feb 15, 2013 at 11:26 AM, Josh Berkus <josh@xxxxxxxxxxxx> wrote: > 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: On all my machines (debian and ubuntu) it collects every 5. > 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" Not a bad idea. esp when benchmarking. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
