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Release: 2016-06-07 16:05:09
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1.查看当前锁对象 select a.owner, a.object_name, b.xidusn, b.xidslot, b.xidsqn, b.session_id, b.oracle_username, b.os_user_name, b.process, b.locked_mode, c.machine, c.status, c.server, c.sid, c.serial#, c.program from all_objects a, v$lock

1.查看当前锁对象
select a.owner,
a.object_name,
b.xidusn,
b.xidslot,
b.xidsqn,
b.session_id,
b.oracle_username,
b.os_user_name,
b.process,
b.locked_mode,
c.machine,
c.status,
c.server,
c.sid,
c.serial#,
c.program
from all_objects a,
v$locked_object b,
v$session c
where ( a.object_id = b.object_id )
and (b.process = c.process )
order by 1,2;

根据查询到的session_sid查询出session的详细信息:

select saddr,sid,serial#,paddr,username,status from v$session where sid='764';

如果确保此lock无效,可以kill掉该session

alter system kill session ’sid,serial#’ ;

【注】以上两步,可以通过Oracle的管理控制台来执行。
如果出现题目的错误,可以
select a.spid,b.sid,b.serial#,b.username from v$process a,v$session b where a.addr=b.paddr and b.status='KILLED';

3.如果利用上面的命令杀死一个进程后,进程状态被置为"killed",但是锁定的资源很长时间没有被释放,那么可以在os一级再杀死相应的进程(线程),首先执行下面的语句获得进程(线程)号:
select spid, osuser, s.program from v$session s,v$process p where
s.paddr=p.addr and s.sid=785 (33就是上面的sid)

4.在OS上杀死这个进程(线程):
1)在unix上,用root身份执行命令:
#kill -9 12345(即第3步查询出的spid)

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