这一个显示当前“活动”的SQL： –

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

/