You can use global access checking to improve performance of RACF® authorization checking for selected resources. Global access checking should be used for public resources that are accessed frequently.

The global access checking table is maintained in storage and is checked early in the RACF authorization checking sequence. If an entry in the global access checking table allows the requested access to a resource, RACF performs no further authorization checking. This can avoid I/O to the RACF database to retrieve a resource profile, and can result in substantial performance improvements.

For more information on the global access checking table, see z/OS Security Server RACF Security Administrator's Guide.