檢視低效的SQL語句

Aminiy發表於2013-04-10
SQL
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; 

來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/24492954/viewspace-765128/，如需轉載，請註明出處，否則將追究法律責任。

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