I recently attended the fantastic JCrete "unconference" on the Greek island of Crete.
It is called an unconference since there are no vendor pitches and the topics for discussion are selected by the attendees.
I saw some great sessions and threw my own hat into the ring to start a discussion on analysing HotSpot logs from the JVM.
Here are the links to my session on the WikiEducator page and also to a set of slides I produced and the GitHub page of a tool called JITWatch I've produced to automate analysis.