When one of the RACF® utility programs is processing a data set in the RACF database, that data set might be unavailable for other use (such as authorization checking). To reduce the impact on the system and on RACF performance, it is recommended that you run the RACF utility programs during slack time in system operation.

You can also reduce the impact to your system by unloading your RACF database. The output from the database unload utility (IRRDBU00) can be used to collect information in the RACF database. For information on IRRDBU00, see z/OS Security Server RACF Security Administrator's Guide and z/OS Security Server RACF Macros and Interfaces.