hundreds of procs
Skip Montanaro
skip at pobox.com
Wed Jun 18 17:38:17 CEST 2003
DTerrell> I have 81 hosts and 91 services being passively monitored on
DTerrell> this machine. What would a possible suggestion of hardware
DTerrell> be?
I have 150+ hosts and 200+ services and am running Nagios 1.1 with no
problem on a Powerbook (800Mhz, 1GB ram). This is my day-to-day machine
(XDarwin, XEmacs, lots of mail is filtered through Spambayes via procmail,
etc). Load average at the moment is within normal bounds:
% w
10:18AM up 4 days, 18:37, 3 users, load averages: 0.14, 0.34, 0.34
USER TTY FROM LOGIN@ IDLE WHAT
skip co - Fri03PM 4days -
skip p2 - Fri03PM 4days -
skip p5 :0.0 Tue11AM 0 -
and top reports a fair amount of available RAM (612MB inactive, 83.2MB
free).
There are only a few Nagios-related processes running at any time:
% while true ; do
> ps auxww | egrep -h nagios | egrep -v egrep | wc -l
> sleep 10
> done
3
7
3
5
1
3
1
1
...
A bunch of things that come to mind (mostly just thinking out loud):
* Maybe you are getting a huge blast of checks all at once. Does your
scheduling page show the scheduled checks to be suitably staggered?
* Did you maybe extend the sleep_time configuration parameter? That would
tend to synchronize checks.
* Is your inter_check_delay_method set to 's'?
* Perhaps it's a network speed issue (does "netstat -in" show a lot of
errors or collisions?)
* Perhaps the hosts you're monitoring are loaded enough themselves that they
respond very slowly to the Nagios requests.
* Have you tried shortening up your service_check_timeout? The default is
60 seconds. Most tests should run very quickly.
* Maybe you just need to bug your boss to buy you a Powerbook. ;-)
--
Skip Montanaro
skip at pobox.com
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