1.查询出占用资源的会话

select l.session_id,o.owner,o.object_name
from v$locked_object l,dba_objects o
where l.object_id=o.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;

3.Kill占用的资源，根据SID，和Serial

alter system kill session '258,28795';