PHP FPM (FastCGI Process Manager) is a popular technology for processing php directives, particularly when used in conjunction with NGINX although it can be used with Apache.
In a common deployment scenario, the webserver is configured as a reverse-proxy with fpm providing the heavy lifting by processing the php code. Some of the most significant benefits of this approach are the ability to scale both up and out as your site or application grows.
Although every Linux distribution will work ‘out of the box’, there are a number of parameters which can be tuned to enhance performance.
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