[펌]리소스를 많이 찾이하는 sql찾기

리소스를 많이 차지 하는 sql찾기 
1) 총 메모리 사용량이 많은 SQL (상위 N개)
SELECT BUFFER_GETS,DISK_READS,EXECUTIONS,SQL_TEXT
FROM (SELECT BUFFER_GETS,DISK_READS,EXECUTIONS,SQL_TEXT
      FROM V$SQLAREA
      ORDER BY BUFFER_GETS DESC  )
WHERE ROWNUM <= :p_rank

2) 평균 메모리 사용량이 많은 SQL (상위 N개)
SELECT BUFFER_GETS,DISK_READS,
       EXECUTIONS,trunc(BUFFER_PER_EXEC) BUFFER_PER_EXEC, address, SQL_TEXT
FROM ( SELECT BUFFER_GETS,DISK_READS, EXECUTIONS,address,
   BUFFER_GETS/DECODE(EXECUTIONS,0,1,EXECUTIONS) BUFFER_PER_EXEC,
   SQL_TEXT
       FROM   V$SQLAREA
       ORDER BY BUFFER_GETS/DECODE(EXECUTIONS,0,1,EXECUTIONS) DESC )
WHERE ROWNUM <=  50

3) 메모리, 디스크 사용량이 일정 기준치를 넘은 SQL
SELECT BUFFER_GETS,DISK_READS,
       EXECUTIONS,BUFFER_GETS/EXECUTIONS,SQL_TEXT
FROM   V$SQLAREA
WHERE  BUFFER_GETS >  :p_val1
OR     DISK_READS > :p_val2
OR     EXECUTIONS > :p_val3

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4) 디스크 사용량 많은 SQL
SELECT BUFFER_GETS,DISK_READS,
       EXECUTIONS,trunc(BUFFER_PER_EXEC) BUFFER_PER_EXEC, address, SQL_TEXT
FROM ( SELECT BUFFER_GETS,DISK_READS, EXECUTIONS,address,
   BUFFER_GETS/DECODE(EXECUTIONS,0,1,EXECUTIONS) BUFFER_PER_EXEC,
   SQL_TEXT
       FROM   V$SQLAREA
       ORDER BY disk_reads DESC )
WHERE ROWNUM <=  50

-- address 에 해당하는 sql찾기
select *
from v$sqltext
where address = 'B443F724'
order by piece;

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