High Service Check Latency

[Assaf Flatto]

On 22/05/12 13:55, 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
One thing I found to help with performance with NDO was to make sure the 
DB is trimmed on a regular basis .
tables timedevents, services , logentries and other ones grow very fast 
to large size and nagios is having trouble writing to the DB if the 
table is larger the 450MB .

since i was using the NDO for nagviz the data was mostly not needed so i 
used to truncate those tables.

If you do use the DB , replicate it to a secondary DB and use that as 
your queries master .and trim the one nagios writes to , but make sure 
that if the trimming is done , the data is not removed from the 
replicated server.

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