v$sqlarea和v$lock

v$sqlarea 保留了每条执行的SQL


SQL> delete from t100 where object_id = :n;

1 row deleted.

SQL> select to_char(sysdate,'yyyy-mm-dd,hh24:mi:ss'),a.sql_text,to_char(a.LAST_ACTIVE_TIME,'yyyy-mm-dd,hh24:mi:ss')  from v$sqlarea a  where sql_text like '%delete%t100%';

TO_CHAR(SYSDATE,'YY SQL_TEXT			          TO_CHAR(A.LAST_ACTI
------------------- ------------------------------ -----------------------------
2014-11-14,09:37:28 delete from t100 where object_id = :n  2014-11-14,09:35:17
		    


SQL> select to_char(sysdate,'yyyy-mm-dd,hh24:mi:ss'),a.sql_text,to_char(a.LAST_ACTIVE_TIME,'yyyy-mm-dd,hh24:mi:ss')  from v$sqlarea a  where sql_text like '%delete%t100%';

TO_CHAR(SYSDATE,'YY SQL_TEXT			         TO_CHAR(A.LAST_ACTI
------------------- ------------------------------ -------------------
2014-11-14,09:38:10 delete from t100 where object_id = :n  2014-11-14,09:37:56



SQL> select to_char(sysdate,'yyyy-mm-dd,hh24:mi:ss'),a.sql_text,to_char(a.LAST_ACTIVE_TIME,'yyyy-mm-dd,hh24:mi:ss')  from v$sqlarea a  where sql_text like '%delete%t100%';

TO_CHAR(SYSDATE,'YY SQL_TEXT			           TO_CHAR(A.LAST_ACTI
------------------- ------------------------------ -----------------------------
2014-11-14,09:43:40 delete from t100 where object_id = :n  2014-11-14,09:42:11
		    

相同的SQL执行显示的是最后被激活的时间

SQL> select sid,id1,ctime, to_char(sysdate,'yyyy-mm-dd,hh24:mi:ss'),to_char(sysdate - a.ctime / 24 / 60 / 60, 'HH24:MI:SS')
                as lock_time from v$lock a
               where type in ('TM','TX');  2    3  

       SID	  ID1	   CTIME TO_CHAR(SYSDATE,'YY        LOCK_TIM
---------- ---------- ---------- ------------------- ---------------
      1613     176570	     939 2014-11-14,09:50:57 09:35:18
      1613     458783	     939 2014-11-14,09:50:57 09:35:18


SQL> select to_char(sysdate,'yyyy-mm-dd,hh24:mi:ss'),a.sql_text,to_char(a.LAST_ACTIVE_TIME,'yyyy-mm-dd,hh24:mi:ss')  from v$sqlarea a  where sql_text like '%delete%t100%'
  2  ;

TO_CHAR(SYSDATE,'YY SQL_TEXT			        TO_CHAR(A.LAST_ACTI
------------------- ------------------------------ ---------------------------
2014-11-14,09:52:01 delete from t100 where object_id = :n  2014-11-14,09:42:11


所以无法判断LAST_ACTIVE_TIME和to_char(sysdate - a.ctime / 24 / 60 / 60, 'HH24:MI:SS')Lock时间的关系

通过lats_load_time ： 执行计划加载到library cache的时间 也不准确

		    
select c.sql_text,
       a.*,
       b.object_name,
       to_char(sysdate, 'YYYY-MM-DD,hh24:mi:ss'),
       to_date(to_char(c.LAST_load_TIME, 'hh24:mi:ss'), 'hh24:mi:ss') load_time,
       to_date(to_char(sysdate - a.ctime / 24 / 60 / 60, 'HH24:MI:SS'),
               'HH24:MI:SS') as lock_time

  from (select sid, id1, ctime
          from v$lock
         where sid in (select sid
                         from v$lock
                        where type in ('TM', 'TX')
                          and lmode = 6)
           and type = 'TM') a,
       dba_objects b,
       v$sqlarea c
 where a.id1 = b.object_id   
   and c.PARSING_SCHEMA_NAME = 'TEST'
   and (c.sql_text like '%update%' or c.sql_text like '%delete%' or
       c.sql_text like '%insert%')
   and c.sql_text like '%t100%'