This is one of the most important chapters in this book. It solely focuses on performance measurement and enhancement strategies. This chapter resembles a real-life health checkup scenario. If a person is unwell, the first step is to identify the symptoms in order to identify and cure the disease. Similarly, this chapter started by identifying the symptoms of performance degradation, moving on to the performance tuning life cycle. Performance tuning patterns and anti-patterns were described, which resemble the best practices to be followed. This was followed by the iterative performance tuning process and JMX support in the Spring framework. We saw an example of Spring beans turned into JMX-managed beans.

The next chapter focuses on fine-tuning the JVM. This will not be tuning that is specific to a Spring application, but is applicable to any application running on JVM. This chapter will do a deep dive into the inside details of JVM, which are not very well-known to developers. Let's get ready to dive into JVM.