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POWhy every request is being processed by PHP-FPM? (even if I'm using Cache)
 

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  1. POWhy every request is being processed by PHP-FPM? (even if I'm using Cache)
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    <p>I'm running Wordpress with: Nginx + PHP-FPM + APC + W3 Total Cache + PageSpeed. After 3 days researching and configuring, I succeeded to configure.</p> <p>Running "top" and hitting some cached pages, it shows:</p> <pre><code>PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 13387 nginx 20 0 472m 11m 4664 S 12.3 2.0 0:46.55 nginx 17577 nginx 20 0 443m 47m 29m S 0.7 8.0 0:42.88 php-fpm 17591 nginx 20 0 438m 43m 29m S 0.7 7.2 0:42.59 php-fpm 1486 mysql 20 0 851m 21m 4832 S 0.3 3.7 1:24.71 mysqld 17907 nginx 20 0 438m 48m 34m S 0.3 8.1 0:36.78 php-fpm 18065 nginx 20 0 442m 47m 29m S 0.3 8.0 0:33.49 php-fpm 18543 nginx 20 0 445m 63m 42m S 0.3 10.6 0:22.94 php-fpm 21125 root 20 0 15012 1148 868 R 0.3 0.2 0:00.86 top 1 root 20 0 19356 1388 1136 S 0.0 0.2 0:00.74 init </code></pre> <hr> <p><strong>1) Why every request is being processed by PHP-PFM? Shouldn't W3 Total Cache supposed to prevent the request from been processed by PHP-FPM?</strong> </p> <p>I know that my page is being cached because every page return in the end of HTML:</p> <pre><code>&lt;!-- Performance optimized by W3 Total Cache. Learn more: http://www.w3-edge.com/wordpress-plugins/ Page Caching using disk: enhanced </code></pre> <hr> <p><strong>2) If I install Varnish in front of Nginx, will it stop the request from being processed by PHP-FPM? (Performance will increase? I'm using a Micro Ec2, Ram = 613MB)</strong></p> <p>PS: The response header is returning "Cache-Control: max-age=0, no-cache" from server. I don't know if this influence W3 Caching.</p> <p>My specs:</p> <ul> <li>Amazon Micro EC2</li> <li>Linux version 3.4.48-45.46.amzn1.x86_64 Red Hat 4.6.3-2 (I think it's based on CentOS 5)</li> <li>PHP 5.3.26 (fpm-fcgi)</li> </ul>
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