On 01/05/07 05:15 PM, Jonathan Call wrote:
> I have set up a distributed monitoring system per the Nagios documentation.
> 
> I initially tested it out by having the distributed server monitor only 24 or 
> so services on about 8 hosts. There didn't seem to be any problems.
> 
> I then cranked it up to 427 services on 81 hosts. I'm watching the 
> distributed server right now and there is hardly any system load but the 
> Service Check Latency seems extremely high:
> 
> Metric                        Min.            Max.            Average
> Check Execution Time:         0.05 sec        1.67 sec        0.701 sec
> Check Latency:                60.40 sec       287.36 sec      184.514 sec
> Percent State Change: 0.00%           0.00%           0.00%
> 
> This is resulting in 50% or less of the service checks completing in the 5 
> minutes or less timeframe.
> 
> The Central server has had no significant change in performance at all and 
> seems to be receiving and processing everything without difficulty.
> 
> The nsca server on the central server is running with the following arguments:
> /usr/local/sbin/nsca --daemon -c /usr/local/etc/nsca.cfg
> 
> The submit_check_result script on the distributed server is right out of the 
> documentation.

There are many ways to do that; my favorite (obviously since I wrote it
:) ) is using the host and service performance data files as named
pipes, and having a daemon reaping them and batch-sending data to
send_nsca..

The howto is here (and I'll be more than happy to answer your questions
or get your feedback):

http://www.nagioscommunity.org/wiki/index.php/OCP_Daemon

It will require Libevent and the Perl module Event::Lib.

Thomas

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