IBM User Guide for Java V7 on Windows > Troubleshooting and support > Using diagnostic tools > Overview of the available diagnostic tools > Summary of cross-platform tooling

JVMRI

The JVMRI interface will be deprecated in the future and replaced by JVMTI extensions.

The JVMRI (JVM RAS Interface, where RAS stands for Reliability, Availability, Serviceability) allows you to control several JVM operations programmatically.

For example, the IBM Virtual Machine for Java™ contains a large number of embedded trace points. Most of these trace points are switched off by default. A JVMRI agent can act as a Plug-in to allow real-time control of trace information. You use the -Xrun command-line option so that the JVM itself loads the agent at startup. When loaded, a JVMRI agent can dynamically switch individual JVM trace points on and off, control the trace level, and capture the trace output.

The JVMRI is particularly useful when applied to performance and leak problem determination, although the trace file might provide clues to the state of a JVM before an unexpected termination or hang.

The RAS Plug-in interface is an IBM-specific interface; that is, it is present only in the IBM Virtual Machine for Java. See Using the Reliability, Availability, and Serviceability Interface for details. You need some programming skills and tools to be able to use this interface.

Parent: Summary of cross-platform tooling

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