Type the value in kilobytes in the Maximum storage available to Edit UNDO command field.
The maximum size of storage in kilobytes for the edit UNDO command to keep a history of edit changes. A minimum value of 1024 is recommended. If the value is 0, then undo is only available from the edit recovery data set. If the value is 1 - 128, then 128 is used. For higher amounts, the value is rounded down to the nearest multiple of 64.
Use of storage for saving the record of changes provides better response time for individual users, but may have a slight detrimental effect on overall system performance.
The default is 0.
keyword UNDO_STORAGE_SIZE