Suppress "Max concurrent service checks" messages.

Paul M. Dubuc work at paul.dubuc.org
Fri Nov 12 18:40:35 CET 2010


Ton Voon wrote:
>
> On 12 Nov 2010, at 15:30, Paul M. Dubuc wrote:
>
>> We're running Nagios 3.2.3 with concurrent service checks set to
>> 40.  We can't
>> go much higher than this due to resource constraints outside of
>> Nagios but
>> we're running 329 services at 5 minute intervals (this is a "load
>> test" of
>> sorts not production load ... yet).  Average execution time/latency
>> is 36/11
>> seconds so we're seeing quite a few messages like this in the Nagios
>> log file:
>>
>> (Informational Message) [11-11-2010 14:55:57] Max concurrent service
>> checks
>> (40) has been reached. Nudging<host>:<service>  by 9 seconds...
>>
>> Is there any way to suppress these messages from being logged?  I
>> don't see an
>> option for logging these in the config file documentation.
>
> I put those messages in.
>
> Firstly, 40 doesn't necessarily mean there are 40 concurrent service
> checks running as they may have finished but not been reaped yet (to
> decrement the counter).
>
> Secondly, if you are getting these messages, then either (1) this
> limit is too low - increase and keep an eye of the load on your nagios
> server; (2) you've got too many checks running - reduce frequencies/
> numbers or setup a slave server.
>
> The trouble with the way the nudging works is that it hides the fact
> that you have latency issues (as the check is rescheduled to a future
> time). This means nagiostats will not include the additional latency
> time here.
>
> If someone has a better way of working this out, I'm all ears.
>
> Ton

Thanks, Ton.  This is helpful information and advice.  The services we're 
running require web browsers to run which are a cpu and memory intensive 
resource that, temporarily, we need to manage on the Nagios server.  In 
production we shouldn't have these limitations, but for now I just wanted to 
keep all these messages from flooding the log.

Andreas, I know it's doing things "wrong", but there's not much I can do about 
it right now.  Since I know what the problem is that these messages are trying 
to tell me.  I'd just like to keep them from flooding the logs so I can see 
what else is happening more easily.  That's all.

Thanks,
Paul Dubuc

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