Dr. Holly Cummins from IBM talks about the performance characteristics of Java virtual machines and dispels a few myths about run-time behaviour, such as “long GC pauses are bad for my application”. She explains why this view is inaccurate and how, overall, this may be better overall. Holly also tells us about the Extensible Verbose Toolkit, IBM’s garbage collection analysis tool, and how to use it for optimizing IBM Java virtual machines.