오라클 undo / Pending Offline Segment

-- PENDING OFFLINE 걸린 SEGMENT 조회
  select name, xacts ACTIVE_TRANSACTIONS FROM
  v$rollname, v$rollstat where status = 'PENDING OFFLINE' and v$rollname.usn = v$rollstat.usn;
 
  -- 특정 ROLLBANK 네임으로 검색
  SELECT S.SID
       , S.USERNAME
    FROM V$ROLLNAME R
       , V$TRANSACTION T
       , V$SESSION S
   WHERE R.NAME = '_SYSSMU26_3785803917$'
     AND T.XIDUSN = R.USN
     AND S.SADDR  = T.SES_ADDR;
    
    
  -- 전체 ROLLBACK 검색 (나온 SID를 KILL 해주면 정상 복구)
  SELECT S.SID
       , S.USERNAME
    FROM V$ROLLNAME R
       , V$TRANSACTION T
       , V$SESSION S
   WHERE R.NAME IN
         (
            select name FROM
                v$rollname, v$rollstat where status = 'PENDING OFFLINE' and v$rollname.usn = v$rollstat.usn
         )
     AND T.XIDUSN = R.USN
     AND S.SADDR  = T.SES_ADDR
     ;
    
  -- ROLLBACNK 상태 검색 
  select * from v$rollstat;    
 
  -- 특정 ROLLBACK 세그먼트 ONLINE
  alter rollback segment "_SYSSMU16_678252039$" online;
 
  -- 롤백 세그먼트 rbs 테이블 스페이스 크기 확인
  SELECT FILE_NAME, BYTES
    FROM DBA_DATA_FILES
   WHERE TABLESPACE_NAME = 'RBS';
  
 
 
  SELECT * FROM DBA_ROLLBACK_SEGS;
 
  -- 언두를 1G 추가 
  alter tablespace UNDOTBS1 add datafile '/u02/data/undotbs2.dbf' size 1000M;