Connecting Java VisualVM to a Local JVM Process

This section provides a tutorial example on how to start Java VisualVM and connect it to a JVM process running on the local machine.

First, Let's run Java VisualVM and connect it to a JVM process running on the local machine.

1. To set up the running JVM process, we can my simple test program called

#- Copyright (c) 2015,, All Rights Reserved.
class LongSleep {
   public static void main(String[] a) {
      Runtime rt = Runtime.getRuntime();
      System.out.println(" Free memory: " + rt.freeMemory());
      System.out.println("Total memory: " + rt.totalMemory());
      try {Thread.sleep(1000*60*60);} 
      catch (InterruptedException e) {}

2. Compile and run it with HotSpot 1.8.0 in a command line window:


C:\herong>\progra~1\java\jdk1.8.0\bin\java LongSleep
 Free memory: 15964984
Total memory: 16252928

3. Launch Java VisualVM in another command line window:


The launcher has determined that the parent process has a console and 
will reuse it for its own console output.
Closing the console will result in termination of the running program.
Use '--console suppress' to suppress console output.
Use '--console new' to create a separate console window.

4. Double-click on "LongSleep" under "Local" in the Application panel. Java VisualVM connects to the running JVM of and display the JVM summary information on the Overview tab:

PID: 560
Host: localhost
Main class: LongSleep
Arguments: <none>

JVM: Java HotSpot(TM) Client VM (25.0-b70, mixed mode)
Java: version 1.8.0, vendor Oracle Corporation
Java Home: C:\progra~1\java\jdk1.8.0\jre
JVM Flags: <none>

Heap dump on OOME: disabled

Okay. We have successfully connected Java VisualVM to a JVM process running on the local machine.
Java VisualVM - JVM Overview Screen

Last update: 2015.

Table of Contents

 About This Book

 Java Tools Terminology

 Installing Java 8 on Windows

 'javac' - The Java Program Compiler

 'java' - The Java Program Launcher

 'jdb' - The Java Debugger

 'jconsole' - Java Monitoring and Management Console

 'jstat' - JVM Statistics Monitoring Tool

 JVM Troubleshooting Tools

jvisualvm (Java VisualVM) - JVM Visual Tool

 What Is jvisualvm (Java VisualVM)?

 jvisualvm Command to Open Dump Files or Conections

Connecting Java VisualVM to a Local JVM Process

 Monitoring Usgaes of CPU, Heap, Classes and Threads

 Monitoring Thread Status as Timeline

 Taking Thread Dump to See Thread Stack Traces

 Taking Heap Dump to See Memory Usages

 Viewing a Heap Dump File

 Connecting to Remote JVM Processes

 Avaible Plugins and Installation

 Installing Visual GC Plugin

 'jar' - The JAR File Tool

 'javap' - The Java Class File Disassembler

 'keytool' - Public Key Certificate Tool

 'native2ascii' - Native-to-ASCII Encoding Converter

 Outdated Tutorials


 PDF Printing Version