Introduction of Garbage Collectors

This chapter provides tutorial notes and example codes on garbage collectors. Topics include JVM memory management summary; Introduction of Generational Garbage Collector; Young and Tenured Heap regions; Eden and Survivor spaces; Mark-Sweep-Compact algorithm; Garbage collector variations.

JVM Memory Manager - Garbage Collector

Generational Garbage Collection in HotSpot

Young Generation Collection - Minor GC

Young Generation Collectors - Serial, PS, ParNew, G1

Tenured Generation Collection - Major GC

Tenured Generation Collectors - Serial, ParOldGen, CMS, G1

Collector Combinations: Serial, Parallel, Concurrent, G1

Conclusions:

Table of Contents

 About This Book

 Heap Memory Area and Size Control

 JVM Garbage Collection Logging

Introduction of Garbage Collectors

 Serial Collector - "+XX:+UseSerialGC"

 Parallel Collector - "+XX:+UseParallelGC"

 Concurrent Mark-Sweep (CMS) Collector - "+XX:+UseConcMarkSweepGC"

 Garbage First (G1) Collector - "+XX:+UseG1GC"

 Object References and Garbage Collection

 Garbage Collection Performance Test Program

 Performance Tests on Serial Collector

 Performance Tests on Parallel collector

 Performance Tests on Concurrent collector

 Performance Tests on G1 collector

 Garbage Collection Performance Test Summary

 Outdated Tutorials

 References

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