Bringing a webapp into production is one thing, but ensuring it runs 24/7 is its own science.
MoSKito (http://www.moskito.org) is an open source application performance management tool, which provides you detailed information about application's behavior, thread, cpu and memory usage, execution time of every method in your class, errors in your application and many more.
The talk give a brief 5 minute introduction into MoSKito's tools and concepts, rest of the time is used for a live demonstration on a living web-application with real glitches. Usage of apache tomcat and tomcat specific information usage in MoSKito are in focus of the talk.