A default installation of FastCGI on cPanel server is dangerously simple. It’s dangerous because one cPanel account (or one vhost) is capable of crashing down a whole server if, say, traffic were to spike up. It’s also simple because it won’t allow complex scripts to run cleanly. In brief, it’s absolutely not ready for production as-is. In this post, I’ll go over what it takes to configure FastCGI on a cPanel node properly.
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Before you continue reading, be sure to have FastCGI up and running as the PHP handler on your cPanel server. The installation of FastCGI is covered in the online cPanel documentation. From here on now, I’ll assume you’re ready to add the settings for FastCGI.
The following is a list of settings that you need to add to /etc/httpd/conf/php.conf upon switching to FastCGI:
MaxRequestsPerProcess 1000 FcgidMaxProcesses 200 FcgidProcessLifeTime 7200 MaxProcessCount 500 FcgidIOTimeout 400 FcgidIdleTimeout 600 FcgidIdleScanInterval 90 FcgidBusyTimeout 300 FcgidBusyScanInterval 80 ErrorScanInterval 3 ZombieScanInterval 3 DefaultMinClassProcessCount 0 DefaultMaxClassProcessCount 3 MaxRequestLen 20468982
You’re more likely to adjust the settings in bold above. DefaultMinClassProcessCount 0 instructs FastCGI to keep zero PHP processes running for user when traffic is idle (cPanel account user) . On the other hand, DefaultMaxClassProcessCount 3 tells FastCGI to never allow more than 3 PHP processes running at a time. This settings prevents one users from crashing the server were they to receive a lot of traffic.
So go ahead and copy/paste the above into your httpd.conf and restart Apache (service httpd restart). You’re good to go now! For greater performance, be sure to check out our Varnish plugin. Whether you’re running suPHP, FastCGI, or even DSO (mod_php), Varnish will make your website load much faster.
That’s all folks!