title: Which database engine to choose for Django app?
body: <p>I'm new to Django and have only been using sqlite3 as a database engine in Django. Now one of the applications I'm working on is getting pretty big, both in terms of models' complexity and requests/second.</p>
  <p>How do database engines supported by Django compare in terms of performance? Any pitfalls in using any of them? And the last but not least, how easy is it to switch to another engine once you've used one for a while?</p>