On Thu, 10 Dec 2009, Vanush Misha Paturyan wrote: > On Tue, 8 Dec 2009 11:04:47 +0000 (GMT) John Hodrien > <[email protected]> wrote: > >> Watching the disk array this morning, it appeared that you'd get a >> period of normal blinking activity lights, then it'd all go silent >> for maybe 5 seconds, then solid on for a short while, then back to >> blinking. This looked odd to me. > > I find "sysstat" http://pagesperso-orange.fr/sebastien.godard/ package > with it's "sar" commands and crontab jobs very handy to collect > information and analyze it later. I run Debian on servers so for me > simple "apt-get install sysstat" and afterwards modifying > "/etc/default/sysstat" to allow for data collection is sufficient to > get files in /var/log/sysstat. Then wait for system to misbehave and > start analyzing data with "sar" command. Whatch out for memory > consumption and where does CPU spend most of the time?
Yep, I'm using sar. Memory consumption isn't really an issue (it's not swapping in the slightest, in fact about 6.5 of the 8Gbytes it has is accounted for by 'cached'. While normally idle it reports 0.04% average iowait, but this rises to ~50% under this particular nfs load. jh _______________________________________________ Linux-PowerEdge mailing list [email protected] https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
