V$OBJECT_USAGE

piece from oracle online doc about v$object_usage

V$OBJECT_USAGE
You can use this view to monitor index usage. The view displays statistics about index usage gathered from the database. All indexes that have been used at least once can be monitored and displayed in this view
.

Column Datatype Description
INDEX_NAME VARCHAR2(30) Index name in sys.obj$.name
TABLE_NAME VARCHAR2(30) Table name in sys.obj$.name
MONITORING VARCHAR2(3) YES| NO
USED VARCHAR2(3) YES| NO
START_MONITORING VARCHAR2(19) Start monitoring time in
sys.object_stats.start_monitoring
END_MONITORING VARCHAR2(19) End monitoring time in
sys.object_stats.end_monitoring