Setting up and checking your z/OS environment

Set up the correct environment for the z/OS® VM to run correctly.

Check operating system requirements

See z/OS systems for information about any changing operating system prerequisites for correct JVM operation.

LE settings

Language Environment® (LE) Runtime Options (RTOs) affect operation of C and C++ programs such as the JVM. In general, the options provided by IBM® using C #pragma statements in the code must not be overridden because they are generated as a result of testing to provide the best operation of the JVM.

Environment variables

Environment variables that change the operation of the JVM in one release can be deprecated or change meaning in a following release. Therefore, you should review environment variables that are set for one release, to ensure that they still apply after any upgrade.

For information on compatibility between releases, see the SDK for z/OS website at https://www.ibm.com/systems/z/os/zos/tools/java/products/sdk.html.