Configuring the JRE

This section describes the Java Runtime Environment (JRE), and how to configure it for the various supported platforms.

Where a JRE is provided by TMTM for a particular platform it is included in the bootstrap and dependent components are configured to look for the JRE in a default location relative to their directory (based on the default agent layout).

Depending on the monitored technology, it might not always be appropriate to use the provided JRE. In these cases, set a JAVA_HOME environment variable for that particular monitoring extension so that it uses the appropriate JRE. If you want to define an alternative JRE for your platform, see Defining alternative JREs for Java extensions.

Where a JRE is not provided for the platform, one must be available for those components that require it. In those cases the JAVA_HOME environment variable must be set to indicate where a JRE can be found.

When setting JAVA_HOME in your environment, consider the monitoring environment as a whole. Your monitoring requirements might call for multiple Java versions to be available, or multiple JREs configured with different settings (e.g. for security configuration purposes).

Versions of JREs included in TMTM