In this session, we will take a practical, hands-on look at Java performance tuning. We will discuss methodology (the scientific method), and how to apply it to Java SE systems (on any budget). Exploring concrete examples using tools such as Java Mission Control, VisualVM and Yourkit, we will focus on ways of measuring performance, learn how to interpret the data, and discuss ways of eliminating bottlenecks and even how to avoid future performance regressions.