Nagios and Gearman - huge environment performance problem

Daniel Wittenberg daniel.wittenberg.r0ko at statefarm.com
Wed Aug 24 16:59:46 CEST 2011


Yes, it's not been much of a mystery that it's not multi-threaded, because as he points out usually your checks and other support procs are using the other processors so it normally works out ok.  Maybe not ideal, but it normally works out ok.

Dan


From: Rodney Ramos [mailto:rodneyra at gmail.com]
Sent: Wednesday, August 24, 2011 9:32 AM
To: Nagios Developers List
Subject: Re: [Nagios-devel] Nagios and Gearman - huge environment performance problem

Thank you Mark for unveiling the idle CPU mystery! This proves that Nagios uses just one core. It´s a big problem.
On Tue, Aug 23, 2011 at 6:48 PM, Mark Goldfinch <mark.goldfinch at modicagroup.com<mailto:mark.goldfinch at modicagroup.com>> wrote:
----- Original Message -----

> From: "Rodney Ramos" <rodneyra at gmail.com<mailto:rodneyra at gmail.com>>
> To: "Nagios Developers List" <nagios-devel at lists.sourceforge.net<mailto:nagios-devel at lists.sourceforge.net>>
> Sent: Wednesday, 24 August, 2011 8:21:42 AM
> Subject: Re: [Nagios-devel] Nagios and Gearman - huge environment
> performance problem
>
> But, as Daniel said, there is one thing that I can´t understand. Why
> my idle CPU is with 87%? It´s very weird. Is there something that
> makes the performance better? A Nagios or Operation System
> parameter?
On this particular point, the overall system CPU statistics displayed at the top of "top" are an average across all CPUs.  As previously mooted, Nagios core isn't multi-threaded, so it can only max a single core.  100% of 1/8 CPUs == 12.5% hence why you're seeing 87.5% idle time, 7 of your cores are not stressed out.

Thanks,
Mark.

------------------------------------------------------------------------------
EMC VNX: the world's simplest storage, starting under $10K
The only unified storage solution that offers unified management
Up to 160% more powerful than alternatives and 25% more efficient.
Guaranteed. http://p.sf.net/sfu/emc-vnx-dev2dev
_______________________________________________
Nagios-devel mailing list
Nagios-devel at lists.sourceforge.net<mailto:Nagios-devel at lists.sourceforge.net>
https://lists.sourceforge.net/lists/listinfo/nagios-devel

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://www.monitoring-lists.org/archive/developers/attachments/20110824/2d29cdb7/attachment.html>
-------------- next part --------------
------------------------------------------------------------------------------
EMC VNX: the world's simplest storage, starting under $10K
The only unified storage solution that offers unified management 
Up to 160% more powerful than alternatives and 25% more efficient. 
Guaranteed. http://p.sf.net/sfu/emc-vnx-dev2dev
-------------- next part --------------
_______________________________________________
Nagios-devel mailing list
Nagios-devel at lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nagios-devel


More information about the Developers mailing list