确定最耗CPU用户、语句

SET line 800
SET pages 100
col sid format 9990
col SERIAL# format 999990
col top_io_machine format a8
col top_io_program format a10
col top_io_sql format a50
SET colsep |

SELECT /*+ rule */
 aa.sid      AS "sid",
 aa.serial#  AS "SERIAL#",
 aa.VALUE    AS "CPU",
 bb.VALUE    AS "MEN-PGA",
 cc.VALUE    AS "I/O-Phy-read",
 cc.machine  AS top_io_machine,
 cc.program  AS top_io_program,
 cc.sql_text AS top_io_sql
  FROM (SELECT d.sql_text,   c.machine,
               c.program,    c.sid,
               c.serial#,    a.NAME,
               b.VALUE
          FROM v$statname a, v$sesstat b, v$session c, v$sqlarea d
         WHERE NAME = 'CPU used by this session'
           AND a.statistic# = b.statistic#
           AND c.sid = b.sid
           AND c.status = 'ACTIVE'
           AND d.address = c.sql_address) aa,
       (SELECT d.sql_text,   c.machine,
               c.program,    c.sid,
               c.serial#,    a.NAME,
               b.VALUE
          FROM v$statname a, v$sesstat b, v$session c, v$sqlarea d
         WHERE NAME = 'session pga memory'
           AND a.statistic# = b.statistic#
           AND c.sid = b.sid
           AND c.status = 'ACTIVE'
           AND d.address = c.sql_address) bb,
       (SELECT d.sql_text,   c.machine,
               c.program,    c.sid,
               c.serial#,    a.NAME,
               b.VALUE
          FROM v$statname a, v$sesstat b, v$session c, v$sqlarea d
         WHERE NAME = 'physical reads'
           AND a.statistic# = b.statistic#
           AND c.sid = b.sid
           AND c.status = 'ACTIVE'
           AND d.address = c.sql_address) cc
 WHERE aa.sid = bb.sid
   AND aa.sid = cc.sid
   AND aa.serial# = bb.serial#
   AND aa.serial# = cc.serial#
 ORDER BY 5 ASC, 4 ASC, 3 ASC