ORACLE死锁问题

查看锁表进程SQL语句1：

<SQL>
select sess.sid,
sess.serial#,
lo.oracle_username,
lo.os_user_name,
ao.object_name,
lo.locked_mode
from v$locked_object lo,
dba_objects ao,
v$session sess
where ao.object_id = lo.object_id and lo.session_id = sess.sid;
查看锁表进程SQL语句2：
select * from v$session t1, v$locked_object t2 where t1.sid = t2.SESSION_ID;
</SQL>

杀掉锁表进程：

复制所有的SID和SERIAL列内容到电子表格中，然后将SQL语句

alter system kill session ‘738,1429’;

编写公式为：

=”alter system kill session ‘”&A1&”,”&B1&”’;”

粘贴公式到ORACLE中统一删除。

用这个可以查：

<SQL>
select s.sid,s.machine,o.object_name,l.oracle_username,l.locked_mode,
'ALTER SYSTEM KILL SESSION '''||s.sid||', '||s.serial#||''';' Command
from v$locked_object l,v$session s,all_objects o
where l.session_id=s.sid and l.object_id=o.object_id
可以查看哪台机器哪个用户锁了记录, 其中command是用来杀掉锁住记录的session
*******************************************************************************************
SELECT A.OBJECT_ID, B.OBJECT_NAME, A.SESSION_ID, A.ORACLE_USERNAME, A.OS_USER_NAME, A.PROCESS, A.LOCKED_MODE
FROM V$LOCKED_OBJECT A, DBA_OBJECTS B WHERE A.OBJECT_ID = B.OBJECT_ID;

SELECT T2.USERNAME, T2.SID, T2.SERIAL#, T2.LOGON_TIME
FROM V$LOCKED_OBJECT T1, V$SESSION T2
WHERE T1.SESSION_ID = T2.SID
ORDER BY T2.LOGON_TIME;

ALTER SYSTEM KILL SESSION 'sid, serial#';
</SQL>

<SQL>
session 1: C:\>sqlplus hxg/hxg
SQL> select * from scott.t;
SQL> update scott.t set b='good' where a=222;
SQL> select * from scott.t;
SQL> update t set b='asdfds' where a=222;

session 3: C:\>sqlplus "system/*** as sysdba"
SQL> select sid,serial#,username,status from v$session;
SQL> alter system kill session '148,2';
SQL> select sid,serial#,username,status from v$session;
SQL>
</SQL>

<SQL>
select V$SESSION.sid,v$session.SERIAL#,v$process.spid,
rtrim(object_type) object_type,rtrim(owner) || '.' || object_name object_name,
decode(lmode, 0, 'None',
1, 'Null',
2, 'Row-S',
3, 'Row-X',
4, 'Share',
5, 'S/R
d8fb
ow-X',
6, 'Exclusive', 'Unknown') LockMode,
decode(request, 0, 'None',
1, 'Null',
2, 'Row-S',
3, 'Row-X',
4, 'Share',
5, 'S/Row-X',
6, 'Exclusive', 'Unknown') RequestMode
,ctime, block b,
v$session.username,MACHINE,MODULE,ACTION,
decode(A.type,
'MR', 'Media Recovery',
'RT','Redo Thread',
'UN','User Name',
'TX', 'Transaction',
'TM', 'DML',
'UL', 'PL/SQL User Lock',
'DX', 'Distributed Xaction',
'CF', 'Control File',
'IS', 'Instance State',
'FS', 'File Set',
'IR', 'Instance Recovery',
'ST', 'Disk Space Transaction',
'TS', 'Temp Segment',
'IV', 'Library Cache Invalida-tion',
'LS', 'Log Start or Switch',
'RW', 'Row Wait',
'SQ', 'Sequence Number',
'TE', 'Extend Table',
'TT', 'Temp Table',
'Unknown') LockType
from (SELECT * FROM V$LOCK) A, all_objects,V$SESSION,v$process
where A.sid > 6
and object_name<>'OBJ$'
and A.id1 = all_objects.object_id
and A.sid=v$session.sid
and v$process.addr=v$session.paddr;
</SQL>

同样也是通过写sql从数据字典里查出来。

<SQL>
SELECT-SQL1
功能:检查被加锁的对象
select obj.OWNER||'.'||obj.OBJECT_NAME as OBJ_NAME, // 对象名称(已经被锁住)
obj.SUBOBJECT_NAME as SUBOBJ_NAME, // 子对象名称(已经被锁住)
obj.OBJECT_ID as OBJ_ID, // 对象ID
obj.OBJECT_TYPE as OBJ_TYPE, // 对象类型
lock_obj.SESSION_ID as SESSION_ID, // 会话SESSION_ID
lock_obj.ORACLE_USERNAME as ORA_USERNAME, // ORACLE系统用户名称
lock_obj.OS_USER_NAME as OS_USERNAME, // 操作系统用户名称
lock_obj.PROCESS as PROCESS // 进程编号
from
( select * from all_objects where object_id in (select object_id from v$locked_object)) obj,
v$locked_object lock_obj
where obj.object_id=lock_obj.object_id;
</SQL>

<SQL>
SELECT-SQL2
功能:检查被加锁的对象以及加锁的会话信息
如果需要手工解除锁,请对照要解锁的对象,记下SESSION_ID,SERIAL#
项,然后运行下面的ALTER-SQL1
select LOCK_INFO.OWNER||'.'||LOCK_INFO.OBJ_NAME as OBJ_NAME, // 对象名称(已经被锁住)
LOCK_INFO.SUBOBJ_NAME as SUBOBJ_NAME, // 子对象名称(已经被锁住)
SESS_INFO.MACHINE as MACHINE, // 机器名称
LOCK_INFO.SESSION_ID as SESSION_ID, // 会话SESSION_ID
SESS_INFO.SERIAL# as SERIAL#, // 会话SERIAL#
LOCK_INFO.ORA_USERNAME as ORA_USERNAME, // ORACLE系统用户名称
LOCK_INFO.OS_USERNAME as OS_USERNAME, // 操作系统用户名称
LOCK_INFO.PROCESS as PROCESS, // 进程编号
LOCK_INFO.OBJ_ID as OBJ_ID, // 对象ID
LOCK_INFO.OBJ_TYPE as OBJ_TYPE, // 对象类型
SESS_INFO.LOGON_TIME as LOGON_TIME, // 登录时间
SESS_INFO.PROGRAM as PROGRAM, // 程序名称
SESS_INFO.STATUS as STATUS, // 会话状态
SESS_INFO.LOCKWAIT as LOCKWAIT, // 等待锁
SESS_INFO.ACTION as ACTION, // 动作
SESS_INFO.CLIENT_INFO as CLIENT_INFO // 客户信息
from
(
select obj.OWNER as OWNER,
obj.OBJECT_NAME as OBJ_NAME,
obj.SUBOBJECT_NAME as SUBOBJ_NAME,
obj.OBJECT_ID as OBJ_ID,
obj.OBJECT_TYPE as OBJ_TYPE,
lock_obj.SESSION_ID as SESSION_ID,
lock_obj.ORACLE_USERNAME as ORA_USERNAME,
lock_obj.OS_USER_NAME as OS_USERNAME,
lock_obj.PROCESS as PROCESS
from
( select * from all_objects where object_id in (select object_id from v$locked_object)) obj,
v$locked_object lock_obj
where obj.object_id=lock_obj.object_id
) LOCK_INFO,
(
select SID,
SERIAL#,
LOCKWAIT,
STATUS,
PROGRAM,
ACTION,
CLIENT_INFO,
LOGON_TIME,
MACHINE
from v$session
) SESS_INFO
where LOCK_INFO.SESSION_ID=SESS_INFO.SID ;
</SQL>

看清楚了 下面就可以 杀死它了。

<SQL>
ALTER-SQL1
功能:杀死会话(SESSION_ID,SERIAL#),可以手工解除锁
请手工修改SESSION_ID,SERIAL#为相应值
注意:本功能慎重使用,有一定的破坏性,该SQL可以断开客户机和服务器的连接
ALTER SYSTEM KILL SESSION 'SESSION_ID,SERIAL#';
</SQL>