What does PHP-FPM do?

What does PHP-FPM do?

PHP FastCGI Process Manager (PHP-FPM) is an alternative FastCGI daemon for PHP that allows a website to handle strenuous loads. It also allows for a host to set specific amounts of resources to process a domain’s requests. PHP-FPM maintains “pools” (workers available to respond to PHP requests) to accomplish this. These “pools” of workers allow the website to handle more requests than it normally could.

PHP-FPM is faster than traditional CGI-based methods, such as SUPHP, for multi-user PHP environments. It does not overload a system’s memory with PHP from Apache processes like ruid2+php-dso does. This method is useful when a user receives extra traffic that requires resources to process it. For example, your website may receive a spike in traffic after a TV show features it or is linked from a popular website.

You can examine your server, locate the source of the extra traffic, and then enable PHP-FPM on that site via the pool manager. PHP-FPM does this through a service to serve PHP requests that Apache routes traffic to. PHP-FPM only executes PHP requests, which enables it to service content quicker than other methods.

As mentioned, PHP-FPM (FastCGI Process Manager) is an alternative PHP FastCGI implementation with some additional features useful for sites of any size, especially busier sites.

These features include:

  • Adaptive process spawning (NEW!)
  • Basic statistics (ala Apache’s mod_status) (NEW!)
  • Advanced process management with graceful stop/start
  • Ability to start workers with different uid/gid/chroot/environment and different php.ini (replaces safe_mode)
  • Stdout & stderr logging
  • Emergency restart in case of accidental opcode cache destruction
  • Accelerated upload support
  • Support for a “slowlog”
  • Enhancements to FastCGI, such as fastcgi_finish_request() – a special function to finish request & flush all data while continuing to do something time-consuming (video converting, stats processing, etc.)

 

… and much more.

It was not designed with virtual hosting in mind (large amounts of pools) however it can be adapted for any usage model.

 

No token or token has expired.

Leave a Reply

Your email address will not be published. Required fields are marked *