In the case where your server uses the Plesk control panel and your domain in question executes PHP as FPM and you need to override one of Plesk's default settings, i.e.:
- Login via SSH as root
- Create the following file:
with the following syntax:/var/www/vhosts/system/[example.com]/conf/php.ini
for example:[php-fpm-pool-settings] //your custom FPM directives here
Then run the following command:[php-fpm-pool-settings] pm.max_children = 25
/usr/local/psa/bin/php_settings -u