--查看等待的session
select * from dba_waiters;

--查看锁等待情况
select distinct lk.SID,lk.ID1,lk.ID2,lk.LMODE,lk.REQUEST,lk.BLOCK,lk.TYPE,do.owner || '.' || do.object_name
from v$lock lk,
v$locked_object lo,
dba_objects do
where do.object_id = lo.OBJECT_ID
and lo.SESSION_ID = lk.SID order by sid;

--根据session的SID查看阻塞会话的详细信息
select p.SPID,
   s.username,
   s.machine,
   s.program,
   s.sid,
   s.serial#,
   s.status,
   c.piece,
   c.sql_text
from v$session s, v$process p,v$sqltext c where sid in(27，1,34) and p.addr = s.paddr and s.sql_address=c.address(+);

--杀掉阻塞的会话
alter system kill session 'sid,serial#';

批量生成杀掉session的语句：
SELECT'alter system kill session '''|| c.sid ||''||','|| c.serial# ||''';',
        a.object_id, a.session_id, b.object_name, c.*
   FROM v$locked_object a, dba_objects b, v$session c
WHERE a.object_id = b.object_id
   AND a.SESSION_ID = c.sid(+)
ORDER BY logon_time;

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oracle阻塞处理

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