Hi, Is there any significant benefit to "convert" the following to AUTO SEGMENT_SPACE_MANAGEMENT? SQL> select tablespace_name, SEGMENT_SPACE_MANAGEMENT 2 from dba_tablespaces 3 where SEGMENT_SPACE_MANAGEMENT != 'AUTO'; TABLESPACE_NAME SEGMEN ------------------------------ ------ SYSTEM MANUAL UNDO MANUAL TEMP MANUAL SQL> I know you cannot convert but recreate the tablespace. But how about SYSTEM? Thanks, Roger Xu