title: Clearing sessions in django_session table without logging out current users
body: <p>I am working on sessions in Django.</p>
  
  <p>By default, django stores sessions in <code>django_session</code>, I found out there is no way to purge sessions.</p>
  
  <p>Though <code>clearsessions</code> can be used to delete rows. It is also recommended to run this as a cron job. But doing this means logging out all logged-in users, right? </p>
  
  <p>Is this the right way to do it?</p>