V$DELETED_OBJECT displays information about deleted archived logs, datafile copies and backup pieces from the control file. The only purpose of this view is to optimize the recovery catalog resync operation. When an archived log, datafile copy, or backup piece is deleted, the corresponding record is marked deleted.
|      Column  |          Datatype  |          Description  |    
|     RECID  |        NUMBER  |        Deleted   object record ID  |   
|     STAMP  |        NUMBER  |        Deleted   object record stamp  |   
|     TYPE  |        VARCHAR2(26)  |        Identifies   the type of deleted object:  
  |   
|     OBJECT_RECID  |        NUMBER  |        Record   ID of the deleted object  |   
|     OBJECT_STAMP  |        NUMBER  |        Record   timestamp of the deleted object  |   
|     OBJECT_DATA  |        NUMBER  |        Displays   additional internal information related to this deleted object. For internal   Oracle use only.  |   
|     SET_STAMP  |        NUMBER  |        Set   stamp of the deleted object  |   
|     SET_COUNT  |        NUMBER  |        Set   count of the deleted object  |   
Note:
1.       There is a bug in 10.2.0.4 and 11.1.0.6 that RMAN resync takes long time when v$deleted_object contains too many rows. The bug will be resolved in 10.2.0.5 (server patch set), 11.1.0.7 (server patch set) and 11.2.