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Efficiently clear expired sessions from the database.

Project description

By default, Django’s cached_db and db session backends loop through deleted sessions in order to trigger pre/post delete signal handlers. This can be extremely slow and consume a lot of CPU and memory on sites with a lot of sessions.

This package provides a SessionStoreMixin class and alternative cached_db and db backends that use the private _raw_delete() method, which is much faster and consumes much less CPU and memory, but does not trigger pre/post delete signal handlers.


Add to your settings:

SESSION_ENGINE = 'django_raw_clearsessions.cached_db'


SESSION_ENGINE = 'django_raw_clearsessions.db'


from some.package import some_backend
from django_raw_clearsessions import SessionStoreMixin

class SessionStore(SessionStoreMixin, some_backend.SessionStore):

SESSION_ENGINE = 'mybackend'

Execute the Django clearsessions management command:

$ python clearsessions

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