For developers running a small vps or any kind of server in which memory is a scarce resource, I highly recommend puma. I needed about 5-6 passenger processes

For developers running a small vps or any kind of server in which memory is a scarce resource, I highly recommend puma. I needed about 5-6 passenger processes in my app to service requests in a timely fashion moving to puma essentially cut down the processes I needed to run to 1 ... saving me about 300MB of RAM, but not only did it save me memory, performance was better than with Passenger. Granted, I miss the ease of just typing touch tmp/restart to reboot my app, and I had to set up Apache (then later Nginx) proxying to get it going but it was well worth it. PS: here is my writeup on how you can get puma up and running with your Apache/Passenger setup in less than an hour to try it out http://www.concept47.com/austin_web_developer_blog/rails/how-to-try-out-puma-with-apache-proxy-right-now/ http://www.concept47.com/austin_web_developer_blog/rails/how...