My first reaction is to question why some checks are taking >15 minutes
to complete (check execution time) and why you are allowing them to go
that long. I only allow a maximum of 60 seconds for any service check to
execute --
(from nagios.cfg)
service_check_timeout=60
host_check_timeout=30
event_handler_timeout=30
notification_timeout=30
ocsp_timeout=5
perfdata_timeout=5
Hmm, you're right. I actually started keeping tabs on execution time
/ latency values a few days ago and I see 1 spike of 929 seconds and
another of about 600 seconds on one service, but everything else (for
that service and others) is much more sane (less that 5 seconds). My
service_check_timeout value is set to "120", so I don't know why those
checks got away like that...
Some comparable stats from my servers --
PIII 800/512MB 828 Service Checks -
Check Execution Time: 0.13 sec 11.59 sec 7.984 sec
Check Latency: 0.76 sec 15.54 sec 6.583 sec
Percent State Change: 0.00% 6.25% 0.03%
All active checks, load hangs out around 2.
Another box, newer hardware, running nagios + cricket --
2x Dual Core AMD Opteron Processor 275, 2GB RAM, 1260 service checks --
Check Execution Time: 0.04 sec 35.02 sec 6.675 sec
Check Latency: 0.01 sec 38.16 sec 6.692 sec
Percent State Change: 0.00% 9.47% 0.04%
All active checks, load hangs out between 1 and 2.
Looks like your setup is performing better than mine and its not due
to the hardware. I'm going to fiddle with some nagios.cfg settings
and see if I have any success.
Thanks for the response.
~trask
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