Flapping Thresholds

[Andreas Ericsson]

Sand Philipp wrote:
>>Sand Philipp wrote:
>>
>>>Hi,
>>>
>>>In the Documentation it's said, that the flapping 
>>
>>functionality uses 
>>
>>>the last 21 check results to calculate the % of flapping. Is it 
>>>possible change that array into maybe 80 instead of 21 
>>
>>check results 
>>
>>>stored in an array?
>>
>>Yes, but with a rather violent increase in memory used by a 
>>running Nagios process. It's (sizeof(ptrdiff_t) * 59 * (hosts 
>>+ services)) byte increase in allocated memory only. The data 
>>PTE will grow even more (it's bloated already, but still).
> 
> Ok, i think I'll check it out. Can you please give a hint, where to look
> in the sourcecode?
> 

Just a wild guess off the top of my head, but base/flapping.c seems like 
a reasonable place to at least learn the variable names. You'll probably 
want to look at something in xdata/*.h to find the macro that defines 
the max number of preserved states for flapping reasons.

> 
>>>Is it safe to hack it into the sourcecode?
>>
>>Yes. It's a computer program we're talking about, not The Bomb.
> 
> You never know :-p
> 
> 
>>>Has anyone experiences with it?
>>
>>Kernighan & Ritchie have extensive, as does a couple of 
>>hundred million people worldwide. C is a very wellknown 
>>language, after all.
> 
> Ah..ok... :-/
> 
> 
> Thanks,
> Philipp
> 
> 
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-- 
Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Lead Developer


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