select S.USERNAME,s.sid,s.osuser,t.sql_id,sql_text
from v$sqltext_with_newlines t,V$SESSION s
where t.address =s.sql_address
and t.hash_value = s.sql_hash_value
and s.status = 'ACTIVE'
and s.username <> 'SYSTEM'
order by s.sid,t.piece
/

这显示锁。有时事情变慢了，但是因为它被阻塞等待锁：

select
  object_name,object_type,session_id,type,-- Type or system/user lock
  lmode,-- lock mode in which session holds lock
  request,block,ctime         -- Time since current mode was granted
from
  v$locked_object,all_objects,v$lock
where
  v$locked_object.object_id = all_objects.object_id AND
  v$lock.id1 = all_objects.object_id AND
  v$lock.sid = v$locked_object.session_id
order by
  session_id,ctime desc,object_name
/

这是找到长操作(例如全表扫描)的好方法。如果是因为很多短的操作，什么都不会显示。

COLUMN percent FORMAT 999.99 

SELECT sid,to_char(start_time,'hh24:mi:ss') stime,message,( sofar/totalwork)* 100 percent 
FROM v$session_longops
WHERE sofar/totalwork < 1
/