title: Django : Iterate over a query set without cache
body: <p>I have a dumb simple loop</p>
  
  <pre><code>for alias in models.Alias.objects.all() :
      alias.update_points()
  </code></pre>
  
  <p>but looking into the django QuerySet it seems to keep around a <code>_result_cache</code> of all the previous results. This is eating Gigs and Gigs of my machine and eventually everything blows up. </p>
  
  <p>How can I throw away all the stuff that I won't ever care about?</p>