high check latency, slow update of config on web interface

[Marc Powell]

> -----Original Message-----
> From: nagios-users-bounces at lists.sourceforge.net [mailto:nagios-users-
> bounces at lists.sourceforge.net] On Behalf Of #ANG CHIN TECK#
> Sent: Monday, May 05, 2008 11:05 PM
> To: nagios-users
> Subject: [Nagios-users] high check latency,slow update of config on
web
> interface
> 
> Hi all,
> 
> I am currently monitoring 50 hosts with no services, only pinging
them.
> perf info for these 50 hosts:
> check interval: 10 mins
> check duration: avg 4 s (5 pings)
> but my check latency fluctuates alot (10s , 140s , 250s)
> 
> I am also monitoring 2 other hosts with 10 services.
> perf info for these 10 services:
> check interval: 1 min
> check duration: avg 3s
> check latency fluctuates (2s, 5s, 48s)
> 
> Why does the latency fluctuates so much?

The version of nagios you are using would be critical information. In
nagios 2.x, active host checks are run in serial, not in parallel and
are highly discouraged because they introduce significant latencies. In
3.x, they've been made to run in parallel. I'm guessing you're using
2.x. Nagios is primarily a service monitoring application and is
designed to monitor services. Host monitoring is typically only done on
an as-needed basis.

> Another problem is that after i update my config file, verify and
restart
> nagios, it takes 15 mins for the web interface to register the change.

Are you using ndoutils? With that few hosts and services the change
should be immediate. Do you see that your objects cache file contains
the new information? Do you have multiple nagios daemons running at the
same time?
 
> Are the 2 problems linked?

Not in any way that I've ever seen.

--
Marc

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