What is PHP-FPM?

programming review

Why PHP-FPM

If Apache has some advantages over Nginx – that would be the ease you can enable PHP. 

Nginx has no out-of-the-box-modules for PHP. So my wild guess – you would probable use PHP-FPM.

PHP-FPM (FPM = “FastCGI Process Manager”) integrates well with Nginx. And it is fast and scalable. As of PHP 5.3.3 PHP-FPM is in its core so you don’t need special install.

PHP-FPM speed

To determine the PHP-FPM speed one would need to explore much, so we can take this as a well-known-truth. Scalable means PHP-FPM can scale the number of its own worker processes that are currently running based on the need—and based on the php-fpm settings. Just to distinguish PHP-FPM worker processes are not the same as Nginx worker processes. Both the servers (Nginx and PHP-FPM) just have the similar pool mechanism.

PHP-FPM features

These 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.)
  • 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 some more. Basically when you type something like this in your system:

Is PHP-FPM enabled?

sys_NEW#rpm -qa |grep php |awk -F'.1|.2|.3|.4|.5' '{ print $1 }'

php-xml
php-imap
php-pear
php-mbstring
php-common
php-pdo
php-odbc
php
php-mysql
php-pecl-apc
php-xmlrpc-5
wbm-php-pear
php-fpm
php-devel
php-cli
php-gd
php-snmp
php-pgsql
php-suhosin
php-mcrypt
php-apc

you should notice that php-fpm is enabled.

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