查看锁定的session信息脚本

查看当前被阻塞的对象和锁信息
SELECT DISTINCT
       s1.inst_id BlockingInst,
       s1.sid BlockingSid,
       s1.serial# BlockingSerial,
       s2.inst_id BlockedInst,
       s2.sid BlockedSid,
       s2.username BlockedUser,
       s2.seconds_in_wait BlockedWaitTime
FROM   gv$session s1,
       gv$lock l1,
       gv$session s2,
       gv$lock l2
WHERE  s1.inst_id = l1.inst_id and
       l1.block in (1, 2) and
       l2.request != 0 and
       l1.sid = s1.sid and
       l1.id1 = l2.id1 and
       l1.id2 = l2.id2 and
       s2.sid = l2.sid and
       s2.inst_id = l2.inst_id
ORDER BY 1, 2, 3

查看被锁的回话信息：
SELECT
   s.blocking_session, 
   s.sid, 
   s.osuser,
   s.seconds_in_wait,
   s.event,
   s.state,
   t.sql_text,
   o.object_name
FROM
   v$session s, v$sqltext t, v$locked_object lo, dba_objects o
WHERE
   blocking_session IS NOT NULL
   and t.hash_value=s.sql_hash_value
   and s.sid=lo.session_id
   and lo.object_id=o.object_id
ORDER BY t.hash_value,t.PIECE;

另外几个可以查询阻塞回话的视图：
DBA_WAITERS
DBA_BLOCKERS
V$WAIT_CHAINS