Making changes to the application environment servers

The command options described are intended to allow changes to application environments without having to shut down the application itself. Use the quiesce function when you want to do one of the following:

Perform maintenance on application program libraries statically allocated to server address spaces.
Update the JCL procedure for an application environment.

When you are ready to put the changes into effect, quiesce the application environment, make the changes to the libraries or service definition as needed, then use the resume function to start new servers with the changed information.

You can also use the quiesce function to suspend execution after repeated application failures or errors. After the errors are corrected, you can resume the application environment.

You may have an application environment where the servers keep application program executable modules in a private cache. If you update the application program, you need to ensure that all copies of the changed modules are replaced wherever they are cached. Use the refresh function to do this.