Nagios Latency

[Vanhee Frederik]

Benjamin,

just out of curiosity : do you use ndomod ?
I experience similar problems; I had a healthy Nagios install (1200 
host, 7000 services, active+passive) with nagios 2.3
After upgrading to Nagios 2.9 with ndo-utils, I have 'latency-peaks' 
every day/few days.
I'm in the middle of testing if it's related to the new Nagios version 
or the extra system load from ndo-utils, or a bug in ndo-utils.

I'll keep the list informed.

Frederik


Benjamin Cleyet-Marrel wrote:
> Hi Andreas,
>
> Thanks for answering .
>
> I have more or less followed the documentation on how to tune nagios.
>
> service_reaper_frequency=2
> max_concurrent_checks=0
> service_interleave_factor=s
> host_inter_check_delay_method=s
>
> The host check command is check_icmp
> We use nagios 2.7.1
> The nagios server is not overloaded  4Go RAM and dual core 3GHz.
>
> But still the nagios latency is increasing for no particular reason ...
> see the graph attached.
>
> Cheers
> Ben
>
>
> Andreas Ericsson wrote:
>> Benjamin Cleyet-Marrel wrote:
>>> Hi,
>>>
>>> I am experiencing problems with Nagios latency that I can't understand.
>>>
>>> Upon Nagios startup or upon Nagios restart, the latency is bellow 
>>> 0.1second which is fine.
>>> After a couple of days, without any change, and even though the 
>>> execution time and the Nagios server load remain the same the 
>>> latency slowly increase.  It seems that it is an exponential growth.
>>>
>>> All the checks kicks in later and later, no exception.
>>>
>>> Usually after a week the latency is up to 60seconds and after 2 week 
>>> up to 5 minutes.
>>>
>>> I have currently set up a Nagios restart every monday, but I would 
>>> like to find a better solution and understand why does the latency 
>>> keeps increasing.
>>>
>>> We monitor over 50 hosts and have over 1400 checks every 5 minutes.
>>> The nagios server is quite big and is not really loaded.
>>>
>>> Any Idea would be appreciated
>>>
>>
>> Three things to check:
>> service_reaper_frequency
>> check_interleave_factor
>> max_parallell_something_something
>>
>> I haven't done my morning routine yet, so you'll have to figure out the
>> real variable names in case my memory is a bit off (which it no doubt 
>> is).
>>
>> Other than that.. What nagios version are you running, and how is your
>> host check command defined?
>>
>>
>
>
>
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