1. 通过v$session，v$locked_object查看谁锁定了资源
select t1.sid, t1.serial#, t1.username, t1.logon_time
from v$session t1 , v$locked_object t2
where t1.sid = t2.session_id
order by t1.logon_time
2. 通过alter system kill session 'sid, serial#'把session kill掉
alter system kill session '6,8'