On 6 December 2010 19:02, Ian Ehrenwald <iehrenw...@tripadvisor.com> wrote: > Hello > I was wondering if there was a straight-forward way to alert based on an > average of past data plus a current perfdata entry. I understand I'm not > explaining it very well that way, so here is the real-world example I am > working with - > > I am polling a set of machines via SNMP for CPU load every 1 minute (looking > at hrProcessorLoad). If the return value is at or above 95%, send out a > WARNING. If the return value is 98% or above, send out a CRITICAL. The > problem here is that it's OK for a process to take up 100% CPU for multiple > seconds, and sometimes that high CPU usage coincides with the SNMP %CPU > query, so I get a lot of false alerts. > > Is there a way to use past perfdata in conjunction with the current returned > data to generate an average and send a WARNING or CRITICAL based on that new > number? I only care to get alerted from Nagios if, for example, the %CPU has > been at 100% for 5 minutes. Or am I just way over-thinking this and should > be monitoring 1m, 5m, 15m UNIX load averages (which doesn't seem that > accurate anyway)? What are other people doing to monitor CPU usage and alert > on abnormal long periods of utilization?
Nagios will alert as soon as the plugin returns a non-OK status. You can of course configure max_check_attempts and/or first_notification_delay so that Nagios won't send a notification until after a given time, but this won't stop it from appearing on on the web page for problem services straight away. It would be great if you could get Nagios to display only hard status alerts - I don't think you can though, not with ordinary Nagios Core anyway. Some of the third-party Nagios front ends will do it, for example you can configure the icons in NagVis only to display hard alerts. 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
