WSGIDaemonProcess

WSGIDaemonProcess is an Apache mod_wsgi directive that defines a daemon process group for running Python WSGI applications. It tells Apache to start and manage a set of separate interpreter processes that host one or more WSGI applications, isolating Python code from Apache’s own worker processes.

Each daemon group can be configured with resources and environment settings. When used together with the WSGIProcessGroup and WSGIScriptAlias directives, requests matching a WSGI script are dispatched to the corresponding daemon group, enabling per-application isolation and tuning. This daemon mode is distinct from running Python code in the main Apache processes and is commonly used to improve stability and scalability for Python web apps.

Common options include processes, threads, maximum-requests, display-name, user, group, python-home, and python-path. These control how many Python interpreters run, how many threads they host, how many requests before recycling a process, the display name in system tools, the OS user and group to run as, and the Python environment and path used by the interpreters. By configuring these settings, administrators can tailor resource usage and isolation per application.

Example: WSGIDaemonProcess app1 processes=2 threads=25 display-name=%{GROUP} python-home=/var/www/venv python-path=/var/www/app

See also: WSGIProcessGroup, WSGIScriptAlias, mod_wsgi.