RMAN delete expired & amp; delete obsolete

RMAN delete expired & delete obsolete read the official documentation for explanation: delete exipired [plain] If you run CROSSCHECK, and if RMAN cannot locate the files, then it updates their records in the RMAN repository to EXPIRED status. you can then use the delete expired command to remove records of expired backups and copies from the RMAN repository delete obsolete [plain] The rman delete command supports an OBSOLETE option, which deletes backups that are no longer needed to satisfy specified recoverability requirements. you can delete files obsolete according to the configured default retention policy, or another retention policy that you specify as an option to the delete obsolete command. as with other forms of the DELETE command, the files deleted are removed from backup media, deleted from the recovery catalog, and marked as DELETED in the control file in short, that is, the difference between "not" and "whether or not" expired is no longer available, and it is not necessarily unnecessary to leave obsolete. what you don't need is not always in database management. What's painful is that you don't need it. What's more painful than this is that what you need is gone.