Hi
If I tail the logs, I see a steady stream of functions that took
longer then 5 seconds. But every now and then I see nothing for 3
minutes and after that a whole bunch (about 20 - 30) queries all
finishing at the same second.
Search this list for references to "checkpoints". If you run
vmstat/iostat for a bit you should see bursts of disk activity at those
times.
Counter-intuitively you probably want *more* checkpoints (with less data
to write out each time), but see the list archives for discussion. Also
check the manuals for some background info.
We use a lot of checkpoints in our database, we don't care about these
much. We think this is causing the checkpoint to write a lot of data at
checkpoint time. Can we stop this behavior ?
--
Adrian Moisey
System Administrator | CareerJunction | Your Future Starts Here.
Web: www.careerjunction.co.za | Email: adrian@xxxxxxxxxxxxxxxxxxxx
Phone: +27 21 686 6820 | Mobile: +27 82 858 7830 | Fax: +27 21 686 6842
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