oracle锁

1. 通过oracle动态视图查看哪些对象正在并发访问，同时谁正在持有资源以及谁在等待它。

SELECT S1.USERNAME BLKG_USER,
       S1.MACHINE BLKG_MACHINE,
       S1.SID BLKG_SID,
       S2.USERNAME WAIT_USER,
       S2.MACHINE WAIT_MACHINE,
       S2.SID WAIT_SID,
       LO.OBJECT_ID BLKG_OBJ_ID,
       DO.OWNER,
       DO.OBJECT_NAME
  FROM V$LOCK L1,
       V$SESSION S1,
       V$LOCK L2,
       V$SESSION S2,
       V$LOCKED_OBJECT LO,
       DBA_OBJECTS DO
 WHERE     S1.SID = L1.SID
       AND S2.SID = L2.SID
       AND L1.ID1 = L2.ID1
       AND S1.SID = LO.SESSION_ID
       AND LO.OBJECT_ID = DO.OBJECT_ID
       AND L1.BLOCK = 1
       AND L2.REQUEST > 0;

2. 释放锁资源

ALTER SYSTEM  KILL SESSION ',' IMMEDIATE;