Boosting performance with G1

The G1 garbage collector was already introduced in JDK 7 and is now enabled by default in JDK 9. It is targeted for systems with multiple processing cores and a lot of available memory. What are the benefits of the G1 compared to previous types of garbage collectors? How does it achieve these improvements? Is there a need to tune it manually, and in what scenarios? These and several more questions regarding G1 will be discussed in Chapter 7, Leveraging the Default G1 Garbage Collector.