Passenger has really become the gold standard in easy deployment of Ruby on Rails apps. It’s amazing simple to configure and quite efficient. In addition to the installation tool, there are a couple small analysis/maintenance tools that are included for giving you some insight into how Passenger is running on your system. You don’t hear much talk about them and I quickly overlooked them at first.
passenger-memory-stats
This tool allows you to see a display of the real-time memory usage for Passenger and Apache.
passenger-status
This tool shows you what your current passenger stats are and what apps are currently running.
You can read more about both of these in the Passenger documention.
