Oracle查看等待事件_yh_zeng2的博客-CSDN博客

--查询等待的会话ID ， 阻塞的等待时间类型、事件ID 、 SQLID 等等信息

      select *
  from v$active_session_history h
where sample_time > trunc(sysdate)
  and session_state = 'WAITING'
  and exists(
        select 1 from v$sql s 
          where upper(s.sql_text) like '%T_USER%'
            and s.sql_id = h.sql_id     
  )
  order by sample_time desc;

--会话阻塞的事件查询

      select * from v$session_wait where sid = 148;

--会话发生过的所有等待事件查询

      select s.time_waited/1000,s.* from v$session_event s where sid = 148;

--被锁了之后，查看持有该锁的会话查询

      select a.sid blocker_sid,
       a.serial#, 
       a.username as blocker_username,
       b.type,
       decode(b.lmode,0,'None',1,'Null',2,'Row share',3,'Row Exclusive',4,'Share',5,'Share Row Exclusive',6,'Exclusive') lock_mode,
       b.ctime as time_held,
       c.sid as waiter_sid,
       decode(c.request,0,'None',1,'Null',2,'Row share',3,'Row Exclusive',4,'Share',5,'Share Row Exclusive',6,'Exclusive') request_mode,
       c.ctime time_waited  
from   v$lock b, v$enqueue_lock c, v$session a  
where  a.sid = b.sid  
  and  b.id1= c.id1(+)
  and  b.id2 = c.id2(+)
  and  c.type(+) = 'TX'
  and  b.type = 'TX' 
  and  b.block   = 1
  and  c.sid = 148
order by time_held, time_waited;

--查询持有锁的会话执行了的SQL

      select s.sql_text,h.* from v$active_session_history h,v$sql s
 where h.sql_id = s.sql_id
   and h.session_id = 150;