As DFSMShsm processes each data set, it deletes those utility data sets that are more than two days old and whose names follow one of the formats listed under Specifying the age for deleting list and utility data sets. It also deletes those list data sets having names with the final qualifier as specified under Specifying the age for deleting list and utility data sets, and older than the age specified with the SCRATCHFREQUENCY parameter of the SETSYS command.