You do of course have to restart Nginx (which in effect restarts Passenger) if you change or add a web application Actually depending on your web framework you

You do of course have to restart Nginx (which in effect restarts Passenger) if you change or add a web application Actually depending on your web framework you don't even have to do that. Werkzeug and others support code-reloading. By the way I had a talk with a passenger developer yesterday and the WSGI support seems to be stabilizing. I was told that dreamhost is already using it in production - so it's undocumented but functional.