锁表的处理

jiawang

Oracle锁表比较简单，查询锁表的session杀掉就可以了。

1、以下几个为相关表

SELECT * FROM V$LOCK;

SELECT * FROM V$SQLAREA;

SELECT * FROM V$SESSION;

SELECT * FROM V$PROCESS;

SELECT * FROM V$LOCKED_OBJECT;

SELECT * FROM ALL_OBJECTS;

SELECT * FROM V$SESSION_WAIT;

2、查看锁表情况
select sid,serial#,event,BLOCKING_SESSION from v$session where event like '%TX%';

3、查看被锁的表

SELECT B.OWNER, B.OBJECT_NAME, A.SESSION_ID, A.LOCKED_MODE
  FROM V$LOCKED_OBJECT A, DBA_OBJECTS B
WHERE B.OBJECT_ID = A.OBJECT_ID;

4、查看那个用户那个进程造成死锁

SELECT B.USERNAME, B.SID, B.SERIAL#, LOGON_TIME
  FROM V$LOCKED_OBJECT A, V$SESSION B
WHERE A.SESSION_ID = B.SID
ORDER BY B.LOGON_TIME;

5、查看连接的进程

SELECT SID, SERIAL#, USERNAME, OSUSER FROM V$SESSION;

6、查出锁定表的sid, serial#,os_user_name, machine_name, terminal，锁的type,mode

SELECT S.SID,
       S.SERIAL#,
       S.USERNAME,
       S.SCHEMANAME,
       S.OSUSER,
       S.PROCESS,
       S.MACHINE,
       S.TERMINAL,
       S.LOGON_TIME,
       L.TYPE
  FROM V$SESSION S, V$LOCK L
WHERE S.SID = L.SID
   AND S.USERNAME IS NOT NULL
ORDER BY SID;

7、  这个语句将查找到数据库中所有的DML语句产生的锁，还可以发现，任何DML语句其实产生了两个锁，一个是表锁，一个是行锁。

8、杀掉进程 sid,serial#

ALTER SYSTEM KILL SESSION'210,11562';