Most popular tool for monitoring and troubleshooting Ruby apps is New Relic. (www.newrelic.com) They have a free version or several paid subscription levels for performance monitoring of apps on Rails, Sinatra, Rack, Merb, JRuby, Grails, and supporting other technologies like Mongrel, Passenger, Thin, Metals, Unicorn and others.
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mike@newrelic.com replied ago:
Most popular tool for monitoring and troubleshooting Ruby apps is New Relic. (www.newrelic.com) They have a free version or several paid subscription levels for performance monitoring of apps on Rails, Sinatra, Rack, Merb, JRuby, Grails, and supporting other technologies like Mongrel, Passenger, Thin, Metals, Unicorn and others.
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