For projects that use the cached_db or db session engines, the django_session table can get quite large after a while.

Django provides the 'cleanup' management command for deleting expired sessions from this table but you have to either run this command manually or set-up a cron job.

Django Session Cleanup provides a periodic task for Celery that will delete expired sessions.

1. Run pip install django-session-cleanup.

2. Add session_cleanup to INSTALLED_APPS in your project's settings.

3. Edit or create CELERYBEAT_SCHEDULE in your project's settings:

   from session_cleanup.settings import weekly_schedule
   CELERYBEAT_SCHEDULE = {
       ...
       'session_cleanup': weekly_schedule
   }