oracle 表的死锁以及解决之道

1.查询锁定的对象

SELECT S.SID SESSION_ID,
       S.USERNAME,
       DECODE (LMODE,
               0, ' None ',
               1, ' Null ',
               2, ' Row-S(SS) ',
               3, ' Row-X(SX) ',
               4, ' Share',
               5, 'S/Row-X (SSX) ',
               6, 'Exclusive ',
               TO_CHAR (LMODE))
          MODE_HELD,
       DECODE (REQUEST,
               0, ' None ',
               1, ' Null ',
               2, ' Row-S(SS) ',
               3, ' Row-X(SX) ',
               4, ' Share',
               5, 'S/Row-X (SSX) ',
               6, 'Exclusive ',
               TO_CHAR (REQUEST))
          MODE_REQUESTED,
       O.OWNER || ' . ' || O.OBJECT_NAME || '  ( ' || O.OBJECT_TYPE || ' ) '
          AS OBJECT_NAME,
       S.TYPE LOCK_TYPE,
       L.ID1 LOCK_ID1,
       L.ID2 LOCK_ID2
  FROM V$LOCK L, SYS.DBA_OBJECTS O, V$SESSION S
 WHERE L.SID = S.SID AND L.ID1 = O.OBJECT_ID AND object_name = 'DAT_USERS';

 

DAT_USERS  -> 此处为对象名，可以是表，也可以是索引。

2.查询出来之后，进行释放操作：

alter system kill session 'sid, serial#'

此处的sid, serial:

 SELECT SID,SERIAL# 
 FROM V$SESSION 
 WHERE SID IN (SELECT S.SID SESSION_ID
                          FROM V$LOCK L, SYS.DBA_OBJECTS O, V$SESSION S
                          WHERE L.SID = S.SID AND L.ID1 = O.OBJECT_ID AND object_name = 'DAT_USERS'
 );