CPU Load and scheduling queue

[Fredrik Wänglund]

I had the same problem until I decreased the 'service_reaper_frequency'

This is my config now:
inter_check_delay_method=s
service_interleave_factor=s
max_concurrent_checks=50
service_reaper_frequency=3

Before I used default values and could end up with services being 
'stuck' for several minutes, now
my check Latency is 1,3,0.095 sec (min, max, avg)



/FredrikW

louafi wrote:

> 
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>>-----Message d'origine-----
>>De : nagios-users-admin at lists.sourceforge.net
>>[mailto:nagios-users-admin at lists.sourceforge.net] >De la part de
>>Subhendu Ghosh Envoyé : mardi 3 juin 2003 18:10
>>À : nagios-users at lists.sourceforge.net
>>Objet : Re: [Nagios-users] CPU Load and scheduling queue
>>
>>
>>On Tue, 3 Jun 2003, louafi wrote:
>>
>>    
>>
>>> 
>>>-----BEGIN PGP SIGNED MESSAGE-----
>>>Hash: SHA1
>>>
>>>Hi,
>>>
>>>I have a problem with my nagios.
>>>
>>>I have 1800 services on 130 hosts.
>>>
>>>All my services have the same configuration :
>>>
>>>define service{
>>>        host_name 42.42.42.42
>>>        service_description CPU:CPU_1
>>>        check_command 
>>>check_unix_cpu!500!0!1000!0!.1.3.6.1.4.1.2021.10.1.3.1!public
>>>        max_check_attempts 4
>>>        normal_check_interval 5
>>>        retry_check_interval 5
>>>        active_checks_enabled 1
>>>        passive_checks_enabled 0
>>>        check_period 24x7
>>>        parallelize_check 1
>>>        check_freshness 0
>>>        flap_detection_enabled 0
>>>        process_perf_data 1
>>>        retain_status_information 1
>>>        retain_nonstatus_information 1
>>>        notification_interval 60
>>>        notification_period 24X7
>>>        notification_options w,c,r
>>>        notifications_enabled 0
>>>        stalking_options o,w,u,c
>>>}
>>>
>>>My nagios.cfg is :
>>>
>>>      
>>>
>><snip>
>>
>>    
>>
>>>inter_check_delay_method=s
>>>service_interleave_factor=s
>>>max_concurrent_checks=10000
>>>service_reaper_frequency=10
>>>sleep_time=1
>>>      
>>>
>><snip>
>>
>>    
>>
>>>My perfdata function enter the check result in RRD and in a mysql 
>>>database to generate statistics.
>>>
>>>Nagios schedules the check, but the check are not executed at the 
>>>scheduling time. For example a sheduled check at 9:42 is executed
>>>at  9:55... My average CPU load is not high (load average: 2.27,
>>>1.41,  1.18).
>>>
>>>My computer is a bi P3 1,26GHz
>>>
>>>I have tried inter_check_delay_method=0.01 without best result.
>>>The  schedule is different (more aggressive) but the check are
>>>late.
>>>
>>>Any ideas ? Thanks a lot.
>>>
>>>      
>>>
>>You are using a "smart" check interleave factor. That allows to
>>Nagios to  schedule the time of the actual check within a time
>>boundary.  It will not  be the same interval every time, but close.
>>
>>Look at the docs for check interleave factor if you want precise
>>control.  
>>
>>-- 
>>-sg
>>    
>>
>
>Thanks for your reply.
>I disagree with you or i don't understand the link between my problem
>and th check interleave factor.
>
>I don't have a problem with the scheduling, the check interleave
>factor only affect scheduling and not scheduling execution.
>
>All my scheduling checks are not executed at the time indicated in
>the Scheduling Queue. Nagios execute this queue with 5-8 minutes of
>late.
>
>Thanks
>
>  
>
>>
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