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Database Buffer Cache Hit Ratio

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You can run below query to find Database Buffer Cache Hit Ratio

SELECT (P1.value + P2.value - P3.value) / (P1.value + P2.value) "Buffer Cache Hit Ratio" FROM v$sysstat P1, v$sysstat P2, v$sysstat P3 WHERE P1.name = 'db block gets' AND P2.name = 'consistent gets' AND P3.name = 'physical reads';   

Posted on : 1/20/2014 by Anuj
 
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