Service latency suddenly through the roof

Deborah Martin Deborah.Martin at Kognitio.com
Mon Mar 23 15:10:26 CET 2009


Andreas, 

Thanks for your reply. I completely agree with the suggestion of upgrading.
I'm currently 
migrating configs across to Nagios 3.0.6 with the hope of switching to this
box in about a week. 
I was hoping to keep the configs on the nagios 2.0b4 box fairly consistent
with the new box so we can 
run them in parallel for about a month before trashing it. 

Should I expect latency to be a lot lower with the new version of Nagios ?
I'm currently looking at the 
logs produced so far for the new version to see what the latency levels are
like. 

regards,
deborah 


-----Original Message-----
From: Andreas Ericsson [mailto:ae at op5.se] 
Sent: 23 March 2009 14:02
To: Deborah Martin
Cc: 'nagios-users at lists.sourceforge.net'
Subject: Re: [Nagios-users] Service latency suddenly through the roof

Deborah Martin wrote:
> Hi,
> 
> I'm running nagios 2.0b4, on suse 9.3. The plan is to upgrade to 3.0.6
> (nagios) and SLES10 sp1. 
> 
> Recently, during some checking of the data that I collect for SLA 
> reporting, I noticed the service latency has gone through the roof!
> 
> The only recent change I've made is to put ssh checks as a host check. 
> This was to filter ssh checks away from the service problem web 
> interface as we do have to shut nodes down from time to time but we 
> don't want to be alerted as a service problem.
> 

Did you also enable scheduled host checks? In 2.x, nagios stops everything
as soon as it runs a host check, so latency will naturally go through the
roof.

> I then had to introduce check_dummy as the service check (otherwise 
> the pre-flight check outputs hundred of lines stating the no services 
> was associated with xxxx host).  The check_dummy service check is only 
> done on a Sunday once per host as it's a dummy check. I thought this 
> would put less load on Nagios (please correct me if I'm wrong)
> 
> We regard service problems to only be checks against our databases. 
> 
> Does anyone know of what could set this servicelatency to suddenly 
> increase like this ?
> 

Since you're running a beta release that's more than 2 years old, I'm not
even remotely interested to guess or investigate this matter. At least
upgrade to latest 2.x stable (2.12, I think?). If the problem still
persists, then it's worth investigating.

-- 
Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Tel: +46 8-230225                  Fax: +46 8-230231

Considering the successes of the wars on alcohol, poverty, drugs and terror,
I think we should give some serious thought to declaring war on peace.


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