Changing stream size

Changing the stream size causes the particular stream to reside in more or less storage than the original. If the size is increased, more data is entered into a stream; if the size is decreased, less is entered. If you do not change the size of the default TSOIN stream, it will probably wrap. Increasing the size to hold all TSO/E commands and data a user enters during a session obviously has a disadvantage: more storage is required. However, decreasing the size causes the stream to wrap sooner, so some stream data is lost by overlaying or wrapping.