trouble with latency

[Scott Behrens]

Cook, Garry wrote:

>Scott Behrens wrote:
>  
>
>>I am getting roughly 3354 seconds of latency per check and I am not
>>sure why.   Everything is enabled in smart mode except for
>>max_concurent_checks because I had trobule with swap.  I took the
>>minimum recommended number and multiplied it by to and set
>>max_concurent_checks to 100.  Any suggestions?  Also 95% of my checks
>>use NRPE. Total services:             1812    
>>Total hosts:                  175
>>MetricMin.Max.Average
>>Check Execution Time:  < 1 sec6 sec0.345 sec
>>Check Latency:2967 sec3859 sec3748.046 sec
>>Percent State Change:0.00%0.00%0.00%
>>    
>>
>
>I'm assuming that you have run the following command:
>/path/to/nagios/bin/nagios -s /path/to/nagios/etc/nagios.cfg
>Because you mention the recommended value for max_concurrent_checks.
>
>However, this will will also give you information about how
>max_concurrent_checks and service_reaper_frequency are related to
>latency. If the reaper frequency is set too high, or max concurrent is
>too low, you can end up with latency issues.
>
>You'll have to play around with different values until you find
>something that works. I recently added about 1500 service checks, and
>also raised my max concurrent checks value to about 150. I ended up with
>about 11 seconds of check latency. So, I've since dropped my reaper
>frequency to 3 seconds (from 5) and dropped concurrent checks to 60. So
>far, this is working out well. My recommended min/max concurrent checks
>are 2 & 6.
>
>Garry W. Cook, CCNA
>Network Infrastructure Manager
>MACTEC, Inc. - http://www.mactec.com/
>303.273.5050 (Office) - 720.220.1862 (Mobile)
>
>
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>
>
>  
>
So i did drop down the reaper frequency to three seconds and i Did up 
the max concurrenct checks to 150 (i noticed anything past 150 i was 
using up to much swap) and im still  having intense latency problems.  
I'm wondering if since most of my checks use NRPE if that could have 
anything to do with it although I am not sure why.  Any additional 
pointers would be appreciated.


Thanks,

Scott

-- 
Scott Behrens  
Network and Systems Staff
Room B-244 1-630-252-4198
Mathematics and Computer Science Division
Argonne National Laboratory 



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