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 this configuration file will be applied to new PHP-FPM sites. To apply changes to existing ones, you need to switch their PHP mode or its version.