Use of PIDFile= in php-fpm.service

Description

When using Type=simple or Type=notify services, the process executed in ExecStart= is monitored directly by systemd and is automatically the main PID. The use of PIDFile= is useless and discouraged by the systemd.service(5) manual page:

Note that PID files should be avoided in modern projects. Use Type=notify, Type=notify-reload or Type=simple where possible, which does not require use of PID files to determine the main process of a service and avoids needless forking.

Source: https://www.freedesktop.org/software/systemd/man/latest/systemd.service.html#PIDFile=

Furthermore, the default configuration of php-fpm.conf has pid = commented out, which is equivalent to not having a PID file.

From systemd's point of view, the service remains exactly the same without the PIDFile= directive. I suggest, therefore, that it be dropped.

PHP Version

PHP 8.5.5 (cli) (built: Apr  8 2026 14:36:19) (NTS)
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Operating System

No response

Commencez par localiser l’unité php-fpm.service et lire son paramètre PIDFile= avec le php-fpm.conf par défaut, où pid = est commenté. Consultez ensuite les indications de systemd.service(5) liées dans l’issue, puis vérifiez que la suppression de la directive ne modifie pas le comportement de la définition du service et que l’unité ne contient plus PIDFile=.