WSGIProcessGroup

WSGIProcessGroup is a directive of the mod_wsgi Apache module used to assign a WSGI application to a specific daemon process group. The value of this directive names a daemon process group that is defined with WSGIDaemonProcess. When used in conjunction with daemon mode, WSGIProcessGroup ensures the WSGI application runs in the designated group, allowing signals, resource management, and termination to be applied to the group as a unit.

In practice, you define a daemon process group and then assign your application to it. For example:

WSGIDaemonProcess myapp processes=4 threads=2

WSGIProcessGroup myapp

WSGIScriptAlias /myapp /var/www/myapp.wsgi

This configuration causes the WSGI application at /myapp to run within the daemon processes created for the group named myapp. If WSGIProcessGroup is not specified, the application runs in the default process group. The directive is ignored when mod_wsgi is configured to run in embedded mode (non-daemon mode).

WSGIProcessGroup is useful for isolating different applications, enabling separate memory and resource management, and facilitating signaling and graceful restarts at the group level. It is typically used in server or virtual host contexts where multiple WSGI applications are served from a single Apache instance.

Notes:

- The group name must correspond to a defined WSGIDaemonProcess group.

- Changes typically require restarting Apache to take effect.