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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><br>
Dan<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Rodney Ramos [mailto:rodneyra@gmail.com]
<br>
<b>Sent:</b> Wednesday, August 24, 2011 9:32 AM<br>
<b>To:</b> Nagios Developers List<br>
<b>Subject:</b> Re: [Nagios-devel] Nagios and Gearman - huge environment performance problem<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">Thank you Mark for unveiling the idle CPU mystery! This proves that Nagios uses just one core. Itīs a big problem.<o:p></o:p></p>
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<p class="MsoNormal">On Tue, Aug 23, 2011 at 6:48 PM, Mark Goldfinch <<a href="mailto:mark.goldfinch@modicagroup.com">mark.goldfinch@modicagroup.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">----- 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>
><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">> But, as Daniel said, there is one thing that I canīt understand. Why<br>
> my idle CPU is with 87%? Itīs very weird. Is there something that<br>
> makes the performance better? A Nagios or Operation System<br>
> parameter?<o:p></o:p></p>
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<p class="MsoNormal">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.<o:p></o:p></p>
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<p class="MsoNormal"><br>
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<p class="MsoNormal">Guaranteed. <a href="http://p.sf.net/sfu/emc-vnx-dev2dev" target="_blank">
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<p class="MsoNormal">_______________________________________________<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><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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