The various subcomponents of OAM make significant use of virtual storage resulting in a high auxiliary storage requirement. In most instances, an installation uses one or more dedicated DASD volumes for paging so that there is sufficient auxiliary storage. If after system tuning low paging activity occurs, you can allocate other low-activity data sets to a paging volume.
OAM exploits 64–bit virtual storage when objects greater than 256MB are written to or read from the file system sublevel or tape. If your installation will implement objects greater than 256MB on the file system sublevel or tape, you must plan for the significantly increased storage utilization on your system. For more information, see Auxiliary storage and real storage considerations.