A RESET_REFBIT request allows you to reset the reference bit in the directory entries for the specified cached data items to indicate that the data items were not recently referenced. You can specify that all directory entries in the structure are processed (CRITERIA=ALL) or only those that contain changed or locked-for-cast-out data (CRITERIA=CHANGED). You can further filter the selection of entries to be processed by specifying NAME and NAMEMASK. The total number of processed directory entries and the number of these directory entries for which the reference bit was actually reset are both returned in the answer area (ANSAREA).

If the request exceeds the model-dependent time-out criteria before processing completes, either a restart token (RESTOKEN) or an extended restart token (EXTRESTOKEN) is returned in the answer area. The token can be specified on the next RESET_REFBIT request to resume processing with the next data item to be processed. Resumed requests are processed identically whether using the RESTOKEN or EXTRESTOKEN to specify the starting location.