nagiosgrapher v1.3 unreliable

[Tedman Eng]

While I can't comment on nagiosgrapher specifically, since I don't use it, I
would suggest for RRDtool in general you take a look at tuning the RRD
heartbeat and step values used in the rrdcreate command.

The factor in Nagios that would cause RRD gaps is most likely service check
latency.  Check latency is (in my experience) amplified by large numbers of
host problems (since everything stops while host-checking)

Using a heartbeat larger than the step value (2x is safe) will give you
headroom in the event that your check latency becomes very large.  This
should help prevent gaps from appearing in the RRD data.


> -----Original Message-----
> From: Hugo van der Kooij [mailto:hvdkooij at vanderkooij.org]
> Sent: Monday, February 06, 2006 11:07 AM
> To: nagios-users at lists.sourceforge.net
> Subject: [Nagios-users] nagiosgrapher v1.3 unreliable
> 
> 
> Hi,
> 
> I have been trying to get nagiosgraper v1.3 working reliable. 
> But it is
> not at all reliable.
> 
> Some services are updated properly every poll. But some other fail to
> update sometimes or even fail to update most of the times resulting in
> graphs with only some snippets.
> 
> If the service was failing intermittently I might explain the 
> issue but I
> would go crazy by the alerts if this was the case. The nagios 
> log does not
> show problem with the services that do not update.
> 
> Might this be an issue with the named pipe setup? Perhaps a 
> limit on the
> number of events it can handle? (With 26 hosts and 57 services I would
> expect this is not the issue.)
> 
> The log file (ngrap.log) is consistent with the rrd graphs.
> Nagios is v2.0 RC2 and the nagios log does not show any down issue.
> 
> I did put some screen shots in http://hvdkooij.xs4all.nl/Nagios/
> 
> How can I establish if Nagios is in fact sending all the 
> performance data?
> 
> Hugo.
> 
> -- 
> 	I hate duplicates. Just reply to the relevant mailinglist.
> 	hvdkooij at vanderkooij.org		
http://hvdkooij.xs4all.nl/
		Don't meddle in the affairs of magicians,
		for they are subtle and quick to anger.


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