JVM Tutorials - Herong's Tutorial Examples - Version 4.23, by Dr. Herong Yang
What Is HotSpot?
This section describes what is HotSpot - A Java VM (Virtual Machine) developed by Sun Microsystems.
What Is HotSpot? Java HotSpot VM is developed by Sun Microsystems. It has key feature called adaptive compiler that application code will be analyzed as it runs to detect performance bottlenecks, or "hot spots". The Java HotSpot VM will then compile those hot spots for a boost in performance.
There are two implementations of the Java HotSport VM:
The main differences of the two implementations are:
Both implementations of Java HotSpot VM are included inside the J2SDK installation package. The next two sections will explain how to invoke them.
By the way, Java HotSpot VM source code is available at http://openjdk.java.net/groups/hotspot/
Last update: 2014.
Table of Contents
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
Running Java HotSpot Client VM
Running Java HotSpot Server VM
VM Memory Usages on Windows Systems
JRockit JVM 28.2.7 by Oracle Corporation
Memory Management and Garbage Collectors
JVM Stack, Frame and Stack Overflow
Thread Testing Program and Result
CPU Impact of Multi-Thread Applications
I/O Impact of Multi-Thread Applications
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