TSO/VTAM time sharing parameters determine how time sharing buffers should be controlled, the maximum number of users, and other options. Unless you want the IBM® default parameters to apply, you must provide a parmlib member containing the parameters that you want. Information about initialization and tuning for your operating system describes the parameters you can code, how to code them, and the IBM defaults.

You can use MVS™ system symbols in the TSOKEY00 parmlib member. For information about using MVS system symbols, see Using MVS system symbols.