.. note::

    Beaker has no upper bound on cache size and will never drop any caches. For

    memory cache, the only option is to regularly restart the worker process.

    For file cache, it must be cleaned manually, as described in the `Beaker

    documentation <https://beaker.readthedocs.io/en/latest/sessions.html#removing-expired-old-sessions>`_::

        find data/cache -type f -mtime +30 -print -exec rm {} \;