High Service Check Latency

[Mike Guthrie]

What kind of information do you have about average CPU load or I\O wait 
time?  Whether Nagios is using ndoutils or not there will be a hardware 
limit as to how many disk writes it can handle in a given period of 
time.  Even though you're only running a few active checks, it could be 
a symptom that your machine is having to wait on itself to write to disk 
for other things as well.  The doc below is written for Nagios XI, but 
of a lot of the items apply to Core as well.  I would consider exploring 
some options with a RAM disk in order to reduce disk activity.

http://assets.nagios.com/downloads/nagiosxi/docs/Utilizing_A_RAM_Disk_In_NagiosXI.pdf



On 5/22/2012 7:55 AM, Simone Felici wrote:
> Il 22/05/2012 13:55, C. Bensend ha scritto:
>
>> I bet you're using NDOUtils.  I wouldn't recommend that.  I couldn't
>> keep a Nagios server with under 6000 services limping along when
>> NDOUtils was running.  Eventually, the check latencies would go
>> through the roof and the entire server would get farther and farther
>> behind.
>>
>> I went to Livestatus.  It took me all of 20 minutes to adjust my
>> reports to use the new interface, and I haven't restart my Nagios
>> daemon since (other than normal maintenance).
>>
> Yes, you're right. My problem is, the solution is implemented into OPSView Community edition. It's
> not a problem to alter-modify installation, btw the result is maybe some functionality in the whole
> system (gui or whatever) would not work anymore. Time to move to other nagios installation? Maybe,
> but not right now.
> For now I would like to know a way to identify (and possible solve) the actual high latency. I've no
> idea if I can enable ndo logging or nagios logging to identify issues or bottlenecks.
>
> Simon
>
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Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and 
threat landscape has changed and how IT managers can respond. Discussions 
will include endpoint security, mobile security and the latest in malware 
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
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