On 10 December 2010 18:43, Rick Carter <rick.car...@umich.edu> wrote: > Hi Jim, > > I'm wondering if load average would get you where you want to be, as in a lot > of cases, a CPU busy might not be a big deal unless the run queue is growing. > > My nagios-fu isn't good enough to tell you how to get that, but when I saw > your message, I thought right away of the linux/unix: > > $ uptime > 13:41 up 2 days, 18:11, 2 users, load averages: 0.31 0.25 0.24 > > Where the 2nd load average is the 5-minute one. > > - Rick
Good point Rick, there is a check_load plugin, and you could indeed set appropriate thresholds to make it concentrate on the 15-minute value rather than the 5-minute or 1-minute values. As to what 'load' actually means I'm not 100% sure. I've read http://www.teamquest.com/resources/gunther/display/5/index.htm a few times, and think it helps a bit! I even bought Gunther's book "Guerilla Capacity Planning" but confess I haven't read anywhere near all of it. I seem to recall reading somewhere that as a general rule of thumb if load is > 2 * the number of cpus, it's probably affecting performance. Certainly on my own Nagios server with 4 CPUs I find it's struggling whenever load is consistently > 10. Cheers, Jim ------------------------------------------------------------------------------ Oracle to DB2 Conversion Guide: Learn learn about native support for PL/SQL, new data types, scalar functions, improved concurrency, built-in packages, OCI, SQL*Plus, data movement tools, best practices and more. http://p.sf.net/sfu/oracle-sfdev2dev _______________________________________________ Nagios-users mailing list Nagios-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null