Tenured Generation Collection - Full Collection

JVM Tutorials - Herong's Tutorial Examples

∟Memory Management and Garbage Collectors

∟Tenured Generation Collection - Full Collection

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

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

Mark - Identify which objects are still live in the Tenured Generation and mark them.
Sweep - Identify garbage by sweeping over the entire Tenured Generation.
Compact - Move live objects towards the beginning of the generation to combine fragmented free spaces into a single contiguous chunk at the end of the generation.

The Mark-Sweep-Compact algorithm is very straightforward as illustrated in the picture below:
HotSpot Tenured Generation (Full) Collection

Last update: 2014.

Table of Contents

About This Book

Downloading and Installing JDK 1.8.0 on Windows

Downloading and Installing JDK 1.7.0 on Windows

java.lang.Runtime Class - The JVM Instance

java.lang.System Class - The Operating System

ClassLoader Class - Class Loaders

Class Class - Class Reflections

Sun's JVM - Java HotSpot VM

JRockit JVM 28.2.7 by Oracle Corporation

JVM Runtime Data Areas

►Memory Management and Garbage Collectors

Memory Management General Rules

Java Exception: "java.lang.OutOfMemoryError: Java heap space"

OutOfMemoryError Comparison of HotSpot and JRockit

Garbage Collection Demonstration

JVM Memory Manager - Garbage Collector

Generational Garbage Collection in HotSpot

Young Generation Collection - Minor Collection

►Tenured Generation Collection - Full Collection

HotSpot Default Garbage Collector - Serial Collector

"-XX:+PrintGCDetails" - Garbage Collection Logging

GC Log Messages on GarbageCollection.java

Serial, Parallel, Concurrent, and Regionalized Collectors

Parallel Collector GC Log Message Format

Parallel Compacting Collector GC Log Message Format

Concurrent Mark-Sweep Collector GC Log Message Format

Garbage First GC Log Message Format

Garbage Collection Tests

JVM Stack, Frame and Stack Overflow

Thread Testing Program and Result

CPU Impact of Multi-Thread Applications

I/O Impact of Multi-Thread Applications

CDS (Class Data Sharing)

Micro Benchmark Runner and JVM Options

Micro Benchmark Tests on "int" Operations

Micro Benchmark Tests on "long" Operations

Micro Benchmark Tests in JIT Compilation Mode

Micro Benchmark Tests on "float" and "double" Operations

Outdated Tutorials

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