dba_rollback_segs
Name Null? Type
------------------- -------- --------------
SEGMENT_NAME NOT NULL VARCHAR2(30)
OWNER VARCHAR2(6)
TABLESPACE_NAME NOT NULL VARCHAR2(30)
SEGMENT_ID NOT NULL NUMBER
FILE_ID NOT NULL NUMBER
BLOCK_ID NOT NULL NUMBER
INITIAL_EXTENT NUMBER
NEXT_EXTENT NUMBER
MIN_EXTENTS NOT NULL NUMBER
MAX_EXTENTS NOT NULL NUMBER
PCT_INCREASE NUMBER
STATUS VARCHAR2(16)
INSTANCE_NUM VARCHAR2(40)
RELATIVE_FNO NOT NULL NUMBER
Information about rollback segments:
select segment_name
, status
from dba_rollback_segs
/
Example output:
SEGMENT_NAME STATUS
------------------------------ ----------------
SYSTEM ONLINE
_SYSSMU1$ ONLINE
_SYSSMU2$ ONLINE
_SYSSMU3$ ONLINE
_SYSSMU4$ ONLINE
_SYSSMU5$ ONLINE
_SYSSMU6$ ONLINE
_SYSSMU7$ ONLINE
_SYSSMU8$ ONLINE
_SYSSMU9$ ONLINE
_SYSSMU10$ ONLINE
You can tell from the unfriendly names, that my database is using automatic undo management.
For more useful DBA queries click here.
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