benchmark question
Dario B. Bestetti (OpServices)
dario.bestetti at opservices.com.br
Mon Dec 14 17:53:04 CET 2009
----- "Patrick Morris" <patrick.morris at hp.com> escreveu:
> shadih rahman wrote:
> > List,
> > Is there any information as to what is the maximum number of
> > services one can run on a single box with single instance of Nagios?
>
> > I did not find any concrete data on this.
> >
> > I am running a single instance of nagios on a quad core 2.5 GHZ
> > machine with with 4 Gigs of RAM.
> >
> > I have total of 7359 service check running on this box. I have also
>
> > ndoutils running on the same box as backend.
> >
> > My total service checks is going to five fold very soon with a lot
> of
> > nrpe checks.
> >
> > Now, my question is should I run multiple instance of nagios on the
>
> > same box or a single instance will be able to handle about 30000
> > service checks?
>
> In my experience, you'll run into issues right around 8,000 checks or
>
> so, depending no output verbosity, on a fairly stock setup. This is
> due
> to the size of the pipe used to temporarily store check results, at
> least on Linux (and you may be seeing it already with your number of
> checks). Around that point, even with quite a bit of tuning, the check
>
> results will fill the pipe in less than a second, which is the minimum
>
> amount of time I've been able to configure Nagios to flush it. When
> that
> happens, latencies go through the roof.
>
> Distributing the checks doesn't solve the problem if you're still
> sending the results to a centralized Nagios instance, since one
> machine
> still needs to process all of them.
>
> I'm working through this situation now, and it's looking like it may
> take a custom kernel with a larger pipe size to handle
> it.
>
> ------------------------------------------------------------------------------
> Return on Information:
> Google Enterprise Search pays you back
> Get the facts.
> http://p.sf.net/sfu/google-dev2dev
> _______________________________________________
> Nagios-users mailing list
> Nagios-users at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/nagios-users
> ::: Please include Nagios version, plugin version (-v) and OS when
> reporting any issue.
> ::: Messages without supporting info will risk being sent to /dev/null
Shadih, we have a customer running over 20.000 service checks in a single box.
The box is 2x Intel Dual-core Xeon 3Ghz with 8Gb RAM. The latency is around 0.7s. The checks are performed between 3min and 5min. They have around 40 simultaneous users.
_________________________________________________
Dario B. Bestetti OpServices
R. Luciana de Abreu, 471 - Sala 403
Porto Alegre, RS - CEP 90570-060
Fone 55(51)32753588 Mobile 55(51)81518218
Fax 55(51)32753588 Email dario.bestetti at opservices.com.br
"In God we trust, the rest we monitor ..."
_________________________________________________
------------------------------------------------------------------------------
Return on Information:
Google Enterprise Search pays you back
Get the facts.
http://p.sf.net/sfu/google-dev2dev
_______________________________________________
Nagios-users mailing list
Nagios-users at lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nagios-users
::: Please include Nagios version, plugin version (-v) and OS when reporting any issue.
::: Messages without supporting info will risk being sent to /dev/null
More information about the Users
mailing list