Page tree
This documentation is for cPanel & WHM version 84 CURRENT builds.  The "RELEASE" version of our documentation can be found in the Version 82 Documentation space.

Skip to end of metadata
Go to start of metadata



We strongly recommend that you only activate Apache PHP-FPM if your server has at least 2 GB of RAM available, or at least 30 MB of RAM per domain. If you enable PHP-FPM on a server with less than the required RAM, your server may experience severe performance issues.

PHP FastCGI Process Manager (PHP-FPM) is an alternative FastCGI daemon for PHP that allows a website to handle high loads. PHP-FPM maintains pools (workers that can respond to PHP requests) to accomplish this. 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.

  • LiteSpeed Web Server uses the lsphp binary. LiteSpeed Web Server does not use the system's PHP-FPM implementation in WHM's MultiPHP Manager interface (WHM >> Home >> Software >> MultiPHP Manager).

  • To monitor applications that use PHP-FPM, select the Monitor checkbox for the PHP-FPM service for cPanel Daemons service in WHM’s Service Manager interface (WHM >> Home >> Service Configuration >> Service Manager).

Running PHP-FPM with CentOS 7 and EasyApache 4

On CentOS 7 systems, EasyApache 4 uses the PrivateTmp option with PHP-FPM. EasyApache 4 does this to increase security for temporary files that the running processes in PHP-FPM access. The PrivateTmp option creates special directories in the /tmp directory for each Apache PHP-FPM version your system uses. It's possible that each time you or the system restarts the PHP-FPM service, the PrivateTmp option will create a new directory.


Removing the PrivateTmp-created directories, either manually or automatically, will cause errors in applications or websites that use PHP-FPM. We strongly encourage that you do not remove these directories. If you need to remove any of these directories, we recommend that you restart the Apache PHP-FPM service. This ensures that Apache PHP-FPM will work correctly.

To restart Apache PHP-FPM, use the following command:

/scripts/restartsrv_apache_php_fpm --hard

More resources for using PHP-FPM

These resources can help you fully utilize PHP-FPM: 

Additional documentation

Additional documentation