Nagios latency on service more than 1000

[Marc Powell]

> -----Original Message-----
> From: nagios-users-bounces at lists.sourceforge.net [mailto:nagios-users-
> bounces at lists.sourceforge.net] On Behalf Of sunchai (gillnaldo : sun)
> Sent: Thursday, September 20, 2007 8:08 AM
> To: nagios-users at lists.sourceforge.net
> Cc: gillnaldo at yahoo.com
> Subject: [Nagios-users] Nagios latency on service more than 1000
> 
> Hi nagios list,
> 
>   I've problem with service/host check latency with service more than
1000
> and host more than 100. Please advise me to tune-up as my requirement.
>   My requirement need service check & alert not more than 5 minutes.
All
> alert must check interval 3 times before alert. The server cpu
> usage/memory use only 50% only.


Hmm. That implies normal_check_interval 2, retry_check_interval 1,
max_check_attempts 3. You'll be doing 8 concurrent checks per second if
they all exit immediately. You'll want to reap those service results as
quickly as possible. Have you read the performance tuning documentation
yet? There's a lot of good stuff there.


>   The nagios summary show on
> =======================================
> HOST SCHEDULING INFORMATION
> ---------------------------
> Total hosts:                     170
> Total scheduled hosts:           170

You certainly don't want scheduled host checks. With nagios-2 and prior,
everything else stops while a host is being checked. If every host check
completed in 1 second you've just told nagios to not check services, or
do anything else for that matter, for about 3 minutes out of every 5.
Nagios will automagically figure out if it needs to run a host check as
necessary based on the state of its services.


--
Marc

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