Changing PHP-FPM pool settings

Why?

When setting up and optimizing your site, it may be necessary to change the PHP-FPM pool parameters, such as "pm.max_children", "pm.start_servers" and others.

Instructions

To change the pool parameters for a particular site, you need to edit the configuration file. Its location depends on the PHP version and operating system type:

For Ubuntu and Debian:

Native version

/etc/php/<your_version_php>/fpm/pool.d/pool.d/pool.d/<site_name>.conf

Example

/etc/php/7.4/fpm/pool.d/pool.d/pool.d/test.com.conf

Alternative version

/opt/<your_version_php>/etc/php-fpm.d/pool.d/<site_name>.conf

Example

/opt/php81/etc/php-fpm.d/pool.d/test.com.conf

For CentOS, AlmaLinux, RockyLinux, and CloudLinux:

Native version

/etc/php-fpm.d/pool.d/<site_name>.conf

Example

/etc/php-fpm.d/pool.d/test.com.conf

Alternative version

/opt/<your_version_php>/etc/php-fpm.d/pool.d/<site_name>.conf

Example

/opt/php71/etc/php-fpm.d/pool.d/test.com.conf

After changing the parameter, save the file and restart the "php-fpm" service with the appropriate version:

For Ubuntu and Debian:

Native version

systemctl restart php<your_version_php>-fpm.service

Example

systemctl restart php7.4-fpm.service

Alternative version

systemctl restart php-fpm<your_version_php>-version.service

Example

systemctl restart php-fpm82.service

For CentOS, AlmaLinux, RockyLinux, and CloudLinux:

Native version

systemctl restart php-fpm.service

 Alternate version

systemctl restart php-fpm<your_version_php>.service

Example

systemctl restart php-fpm82.service

If you want to override the default settings, you can modify the panel configuration file template "/usr/local/mgr5/etc/templates/fpm_site_pool.conf".

Changes made to "fpm_site_pool.conf" will be applied to new PHP-FPM sites. For old ones, you need to switch the PHP mode or version.

TAKE NOTE!

Switching versions or changing the handler affects the Nginx and Apache configuration files from the site, so it can affect the operation of the site, even causing it to fail.