checks per host

[Joel Brooks]

Thanks guys.

I'm not so worried about the monitoring server.  It has lots of head room,
and/but I will continue to monitor that.

I was mainly interested to know about people's experiences using nagios with
a lot of checks per host in terms of usability (web interface),
configuration, etc.

i.e. would it be of any value to focus on checking multiple items per check
rather than having an individual check per monitored item as one person
suggested.

I'm just wondering what people think of using the tools with 100 (or more)
checks per host.

..just general opinion / experiences...

also wondering about load from checks on the monitored hosts... i.e. it
would suck if monitoring actually caused degradation in performance... does
having a lot of checks on a host cause problems?

i.e. I've got the basics covered - cpu, memory, disk.  now i'm adding a lot
of application specific checks - queues, performance counters, log file
pattern matches, etc.  is there a break point (not on the nagios server, but
rather on the clients, or in the UI)?

thanks for the replies.

J


> As pointed out, normal depends on your environment. Some sites only
> check a handful
> of things per host; some check more. The bigger issue is if your
> server can handle
> the number of checks and in a timely fashion. Look at nagios parameters
> Max_service_check_spread,
> max_host_check_spread
> as well as the various params for individual services such as
> check_interval
>
> If you have a check that takes a long time to complete, you'll probably
> want to
> run it less frequently.
>
> If the client were Unix, not windows, you'd have the luxury of being
> able to run
> the check on the host in question. This can be done either via cron and
> have it
> generate a status file that nagios then checks or using NSCA.
>


On Mon, Jul 12, 2010 at 1:39 PM, Joel Brooks <jbrooks at oddelement.com> wrote:

> hey gang,
>
> I'm trying to get a sense of what's normal for the number of checks per
> host.
>
> I'm pushing nagios to a number of servers and the list of things I want to

> monitor keeps growing.
>
> For some servers, I've got > 30 checks - some > 50.
>
> what is "normal" out there?
>
> is there a practical limit?
>
> i'm using nagios 3 on centos 5 to monitor windows with nsclient++ 3.8.

>
> cheers,
>
> J
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