Thank you Mark for unveiling the idle CPU mystery! This proves that Nagios uses just one core. It´s a big problem.<br><br><div class="gmail_quote">On Tue, Aug 23, 2011 at 6:48 PM, Mark Goldfinch <span dir="ltr"><<a href="mailto:mark.goldfinch@modicagroup.com">mark.goldfinch@modicagroup.com</a>></span> wrote:<br> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="im">----- Original Message -----<br> <br> > From: "Rodney Ramos" <<a href="mailto:rodneyra@gmail.com">rodneyra@gmail.com</a>><br> > To: "Nagios Developers List" <<a href="mailto:nagios-devel@lists.sourceforge.net">nagios-devel@lists.sourceforge.net</a>><br> > Sent: Wednesday, 24 August, 2011 8:21:42 AM<br> > Subject: Re: [Nagios-devel] Nagios and Gearman - huge environment<br> > performance problem<br> ><br> </div><div class="im">> But, as Daniel said, there is one thing that I can´t understand. Why<br> > my idle CPU is with 87%? It´s very weird. Is there something that<br> > makes the performance better? A Nagios or Operation System<br> > parameter?<br> <br> </div>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.<br> <br> Thanks,<br> Mark.<br> <div class="im"><br> ------------------------------------------------------------------------------<br> EMC VNX: the world's simplest storage, starting under $10K<br> The only unified storage solution that offers unified management<br> Up to 160% more powerful than alternatives and 25% more efficient.<br> </div>Guaranteed. <a href="http://p.sf.net/sfu/emc-vnx-dev2dev" target="_blank">http://p.sf.net/sfu/emc-vnx-dev2dev</a><br> <div><div></div><div class="h5">_______________________________________________<br> Nagios-devel mailing list<br> <a href="mailto:Nagios-devel@lists.sourceforge.net">Nagios-devel@lists.sourceforge.net</a><br> <a href="https://lists.sourceforge.net/lists/listinfo/nagios-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/nagios-devel</a><br> </div></div></blockquote></div><br>