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Java VisualVM is a tool that provides a visual interface forviewing detailed information about Java applications while they arerunning on a Java Virtual Machine (JVM), and for troubleshootingand profiling these applications. Various optional tools, includingJava VisualVM, are provided with Sun's distribution of the JavaDevelopment Kit (JDK) for retrieving different types of data aboutrunning JVM software instances. For example, most of the previouslystandalone tools JConsole,jstat,jinfo,jstack, andjmap arepart of Java VisualVM. Java VisualVM federates these tools toobtain data from the JVM software, then re-organizes and presentsthe information graphically, to enable you to view different dataabout multiple Java applications uniformly, whether they arerunning locally or on remote machines. Furthermore, developers canextend Java VisualVM to add new functionality by creating andposting plug-ins to the tool's built-in update center.

Java VisualVM can be used by Java application developers totroubleshoot applications and to monitor and improve theapplications' performance. Java VisualVM can allow developers togenerate and analyse heap dumps, track down memory leaks, browsethe platform's MBeans and perform operations on those MBeans,perform and monitor garbage collection, and perform lightweightmemory and CPU profiling.

Java VisualVM was first bundled with the the Java platform,Standard Edition (Java SE) in JDK version 6, update 7.

Overview

• The following documents provide an introduction to JavaVisualVM.
  • Introduction to JavaVisualVM
    • Using the ApplicationsWindow
    • Working with LocalApplications
      • Viewing ApplicationOverview
      • Monitoring an Application
      • Monitoring Application Threads
      • Profiling Applications
      • Connecting to JMX AgentsExplicitly
    • Working with RemoteApplications
      • Viewing ApplicationOverview
      • Monitoring an Application
      • Monitoring Application Threads
      • Connecting to JMX AgentsExplicitly
    • Working with Coredumps
    • Working with Snapshots
    • Browsing a Heap Dump
• The following pages provide information about optional plug-insthat are currently available for Java VisualVM. These plug-ins areevolving outside of the JDK platform's update cycle, soconsequently these pages are hosted on Java.Net.
  • Working withMBeans
  • JConsolePlug-In Wrapper Tab

Tools

• jvisualvm- The manual page for Java VisualVM.

Tutorials and Programmer's Guides

• GettingStarted Extending Java VisualVM - An introduction to the JavaVisualVM APIs, providing details of how to write extensions forJava VisualVM to create customized monitoring, troubleshooting andprofiling services for your applications. This document is hostedon Java.Net.
• VisualVM APIFAQs - This page is hosted on Java.Net.

More Information

• Java VisualVM Developers'Site
• Java SE Platform Monitoringand Management documentation
• Troubleshootingthe Java SE Platform