IT博客-金鳞-随笔分类-Oraclehttp://www.cnitblog.com/chenxin9821/category/8636.html目标->软件测试架构师zh-cnSat, 01 Oct 2011 01:52:33 GMTSat, 01 Oct 2011 01:52:33 GMT60找出低效SQL http://www.cnitblog.com/chenxin9821/archive/2010/04/01/64974.html金鳞金鳞Thu, 01 Apr 2010 06:15:00 GMThttp://www.cnitblog.com/chenxin9821/archive/2010/04/01/64974.htmlhttp://www.cnitblog.com/chenxin9821/comments/64974.htmlhttp://www.cnitblog.com/chenxin9821/archive/2010/04/01/64974.html#Feedback0http://www.cnitblog.com/chenxin9821/comments/commentRss/64974.htmlhttp://www.cnitblog.com/chenxin9821/services/trackbacks/64974.html 

SELECT EXECUTIONS, DISK_READS, BUFFER_GETS,
   ROUND ((BUFFER_GETS-DISK_READS)/BUFFER_GETS, 2) Hit_radio,
   ROUND (DISK_READS/EXECUTIONS, 2) Reads_per_run,
   SQL_TEXT
FROM   V$SQLAREA
WHERE  EXECUTIONS>0
AND     BUFFER_GETS > 0
AND (BUFFER_GETS-DISK_READS)/BUFFER_GETS < 0.8
ORDER BY 4 DESC

金鳞 2010-04-01 14:15 发表评论
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