当Oracle Session被锁死的时候
经常出现一个问题,oracle的某张表突然无法更新了,无论是通过pl/sql Developer 还是通过sqlplus都无法更新,执行update语句或者执行
经常出现一个问题,Oracle的某张表突然无法更新了,无论是通过pl/sql Developer 还是通过sqlplus都无法更新,执行update语句或者执行select * from table_name for update 都一样,一直处于执行状态,无法完成,这时候我就猜想是不是session被锁死了呢?带着这个问题,我们写一条SQL语句:
--锁表查询SQL
SELECT object_name, machine, s.sid, s.serial#
FROM gv$locked_object l, dba_objects o, gv$session s
WHERE l.object_id = o.object_id
AND l.session_id = s.sid;
执行结果如下:
可以看到这一条数据,也就是说,存在那么一个表被锁死了,这时候呢,我们也确认了,之前无法执行update的这张表确实是因为被锁死了所以无法完成更新操作.
如何释放呢?继续执行一条SQl 语句:
ALTER system kill session '601, 802';
可以看到601 和802是查询到SID 和Serial ,格式为:alter system kill session 'sid, serial#'; 执行完成之后:
没有了被锁死的session了,这时候再去执行我们的表更新操作,可以看到,更新已经没有问题了.
本文永久更新链接地址:

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