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<p class="MsoNormal">In high traffic environments it generally make sense to “dedicate” a core to each RX and TX queue you have on the NIC – this way you lower the chances of a single core being overloaded from handling network and thus degrading performance.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">And then at same time within nginx, map the individual processes to other cores.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">So, let’s say say you have 8 cores and 1 RX and 1 TX queue:<o:p></o:p></p>
<p class="MsoNormal"><span lang="PT-BR">Core 0: RX queue<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PT-BR">Core 1: TX queue<o:p></o:p></span></p>
<p class="MsoNormal">Core 2 to 7: nginx processes<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">You’d then set nginx to 6 workers (if you’re not running other stuff on the box).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Now, in your case with php-fpm in the mix as well, controlling that can be hard ( not sure if you can pin php-fpm processes to cores ) – but for nginx and RX/TX queues, it’s for sure possible.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:36.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">nginx <nginx-bounces@nginx.org> on behalf of Raffael Vogler <raffael.vogler@yieldlove.com><br>
<b>Reply-To: </b>"nginx@nginx.org" <nginx@nginx.org><br>
<b>Date: </b>Thursday, 11 January 2018 at 11.55<br>
<b>To: </b>"nginx@nginx.org" <nginx@nginx.org><br>
<b>Subject: </b>Re: 2 of 16 cores are constantly maxing out - how to balance the load?<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:36.0pt"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:36.0pt">Or would it make sense (if possible at all) to assign two or three more cores to networking interrupts?<o:p></o:p></p>
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