Tenured Generation Collection - Major GC

This section describes basic steps of a Tenured Generation Collection, also called a Major GC, which uses a simple 3-step Mark-Sweep-Compact algorithm on the entire Tenured Generation.

The basic algorithm used in Major GC is called Mark-Sweep-Compact, which consists of 3 steps:

The Mark-Sweep-Compact algorithm is very straightforward as illustrated in the picture below:

HotSpot Tenured Generation Collection - Major GC
HotSpot Tenured Generation Collection - Major GC

Table of Contents

 About This Book

 Heap Memory Area and Size Control

 JVM Garbage Collection Logging

Introduction of Garbage Collectors

 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, Z

 Serial Collector - "+XX:+UseSerialGC"

 Parallel Collector - "+XX:+UseParallelGC"

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

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

 The Z Garbage Collector (ZGC) - "+XX:+UseZGC"

 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


 Full Version in PDF/EPUB