Max number of services that can be monitored ?
misc at viceconsulting.co.nz
misc at viceconsulting.co.nz
Wed Oct 12 23:07:41 CEST 2005
Hi Hendrick,
> I would suggest, that Alex should enable the perf-data, to see if
> there is one host or special service that screws up the latency.
> We have one Server with double proceccor Xeon 1,0Ghz, 2 Gig of Ram
OK, so you're saying there may be one host that is particularly lagged and
therefore increasing my average latency?
> 1. Enable the perf-data. (Tip: Say Nagios it should write both, host
> and service perf data in one file. So you can see how Nagios works
> and when the latency screws up)
> 2. Perhaps, even if the memory is not eaten up by nagios, think about
> to give your server more RAM.
> 3. Try to figure out, if your system has sometimes wa-cycles. If
> every process on your system is waiting for IO, then the ram is NOT
> eaten up and swapping isn't used to, but even no performance.
Well I do have perf-data enabled and I am graphing the Nagios server's
metrics. Basically latency used to be fine, but I added 55 new hosts then
it slowed down. The only change in the graphs is the CPU usage went from
~50% to 90-100%. I'm also graphing CPU IO Wait% and IO Wait is
negligible.
> Please tell us, what service_check interval you have. If your nagios
> checks nearly every minute it may be hard for: a) your monitoring
> host, b) the (local) network, c) the (possibly existing) wan network.
>From nagios.cfg:
interval_length=60
> Are your 60 hosts normaly up and running or do they often falls down?
> Everytime when nagios is executing a host check, all other service
> checks are beeing "stopped", because a host check gets a higher check
> priority then a service check. So if the scheduler has enough to do
> for service checks and there are some host checks comming between the
> other service checks are executed later then they normaly were
> scheduled.
The 60 hosts are usually always up.... I may disable host checking though,
I don't find its that useful.
> Hope that gives some ideas.
Yeah... thanks for that info. Gives me a couple of things to think about.
-Alex.
-------------------------------------------------------
This SF.Net email is sponsored by:
Power Architecture Resource Center: Free content, downloads, discussions,
and more. http://solutions.newsforge.com/ibmarch.tmpl
_______________________________________________
Nagios-users mailing list
Nagios-users at 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
More information about the Users
mailing list