Problems with distributed monitoring

[Marcel]

With only 150 services, it should not delay that much nor stops execution of
the main process.
Please check you main nagios.cfg file and look for *command_check_interval*,
if the value attributed to that variable isn't *"-1"* then there is your
problem.

Also, which nagios version are you running?


On Fri, May 14, 2010 at 2:28 PM, Trisha Hoang <trisha at rockyou.com> wrote:

> Hi Sergio,
> Some of the directives I found helpful for our MASTER server are listed
> below.
>
> Since status.dat and nagios.cmd are disk bound, put them on ramdisk will be
> faster.
> status_file=/mnt/ramdisk/status.dat
> command_file=/mnt/ramdisk/nagios.cmd
>
> I don't think aggressive_host_checking is needed as nagios checks for host
> when a service is in error anyway.
> use_aggressive_host_checking=0
> check_host_freshness=0
>
> Service freshness is important as the MASTER tends to process passive
> checks much slower so the services may go stale. However, since our checks
> are 5 min interval, having the MASTER wait for the next round of check is
> fine.
> check_service_freshness=1
> service_freshness_check_interval=420
>
> We use nagios-3.2.1 and I think these directives are still experimental but
> they seem to help. You will see defunct nagios processes that come and go. I
> think it's caused by child forked once instead of twice so one gets killed
> (my theory), but again, it seems to be running ok.
> use_large_installation_tweaks=0
> child_processes_fork_twice=0
>
> Our MASTER receives ~7000 passive checks from the SLAVE but it could only
> process max ~5000 passive checks per 5 min. The latency is about <10 secs.
> For the rest, the MASTER actively checks them. If you or someone knows a way
> to improve passive check processing, that will be great.
>
> Also, in our setup, we don't use NSCA. The slaves have
> ocsp_command=send_service_check where this command inserts the checks into a
> file that gets sent every 5 sec to the master. On the master, there's a
> script that opens this file and inserts the lines directly into the
> nagios.cmd pipe every 5 sec.
>
> Trisha
>
>
>
> ------------------------------------------------------------------------------
>
>
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