Thursday Oct 23, 2014

JMC and JFR Documentation

In case you missed it, the user guides for Java Mission Control and Java Flight Recorder have moved! As of JDK 8u20, links to the 5.4 and 5.3 versions of these docs can be found the JMC tab of the javacomponents page at: http://docs.oracle.com/javacomponents/jmc.htm.

Redirects from the old locations are in place, but please update your bookmarks accordingly!

Tuesday Aug 19, 2014

Java Components Landing Page and Documentation Updates

The new Java Components page provides access to the documentation for tools that are available for monitoring, managing, and testing Java applications. Documentation for the new versions of the following tools is available:

  • JavaTest Harness 4.6. The JavaTest harness is a general purpose, fully-featured, flexible, and configurable test harness that is suited for most types of unit testing. See the JavaTest tab for documentation.

  • SigTest 3.1. SigTest is a collection of tools that can be used to compare APIs and to measure the test coverage of an API. See the SigTest tab for documentation.

The following tools are part of Oracle Java SE Advanced and Oracle Java SE Suite.

  • Java Mission Control and Java Flight Control 5.4 are supported in JDK 8u20. Java Flight Recorder and Java Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis. See the JMC tab for documentation.

  • Advanced Management Console 1.0 is a new tool that is now available. AMC can be used to view information about the Java applets and Java Web Start applications running in your enterprise, and create deployment rules and rule sets to manage the execution of these applications. See the AMC tab for documentation.

  • Usage Tracker tracks how Java Runtime Environments (JREs) are being used in your systems. See the Usage Tracker tab for documentation.

Tuesday Mar 25, 2014

Learn More About Monitoring and Management Improvements in JDK 8

For users of commercial packages Java SE Advanced and Java SE Suite, JDK 8 includes a new version of Java Mission Control (JMC) that introduces a number of improvements to monitoring and profiling the HotSpot VM. JMC is a powerful set of tools for managing a running application and JVM. You can use it to perform extensive analysis based on detailed monitoring and profiling data.

JMC 5.3.0 reintroduces the Diagnostic Commands tab. This tab can be used to remotely execute commands available via the jcmd utility.

Another big improvement is the addition of content types for attributes. This means that each attribute contains metadata about its physical quantity and units, which helps rendering the attribute values on graphs properly with little or no configuration.

In addition, a number of known issues have been fixed, increasing overall stability and performance

To learn more about JMC 5.3.0, see the JMC User's Guide.

Marcus Hirt has presented a screencast titled Introducing Java Mission Control 5.3.0 during the Java 8 Launch Webcast where new JMC features were discussed in more detail.

Tuesday Sep 24, 2013

JavaOne 2013: Oracle Java Mission Control

On Monday, September 23, Marcus Hirt (Oracle) gave his first presentation at JavaOne 2013 entitled Production-Time Profiling Out of the Box. He talked about the latest addition to JDK 7: Oracle Java Mission Control, a tool suite for low-overhead production-time profiling and diagnostics that originated with the JRockit Mission Control. As part of the convergence between the HotSpot and Oracle JRockit JVMs, Oracle Java Mission Control is now available in the HotSpot JDK.

For more information about Oracle Java Mission Control, see the JMC User's Guide.

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