That question is unanswered, I'd also like to know. Passenger3 includes a watchdog which can monitor processes like Bluepill: http://blog.phusion.nl/2010/06/18/

That question is unanswered, I'd also like to know. Passenger3 includes a watchdog which can monitor processes like Bluepill: http://blog.phusion.nl/2010/06/18/the-road-to-passenger-3-technology-preview-2-stability-robustness-availability-self-healing/ http://blog.phusion.nl/2010/06/18/the-road-to-passenger-3-te... Here is a recent Torqbox (jruby jboss app framebork) benchmark article which also includes a comparison between Unicorn/Bluepill with Passenger3. http://torquebox.org/news/2011/03/14/benchmarking-torquebox-round2/ http://torquebox.org/news/2011/03/14/benchmarking-torquebox-... With a few rails apps under low load, Passenger3/REE/MRI1.9 works ok here. If load increases I'll probably look into possible alternatives and aggressive caching.