Buffer cache hit ratio
Hi, How is calculated the buffer cache hit ratio showed on Spotlight on Oracle? It doesn’t match the value calculated from v$sysstat: 1 - ((‘physical reads cache’) / (‘consistent gets from cache’ +...
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Hi Ezio, Spotlight is using the Delta value to calculate the ratio, that is say the value increased in the last data refresh interval (by default 15 secords), and also averaged the ratio value over 30...
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Hi Kevin, Thx for an answer. Delta value to calculate the ratio Could you elaborate a little better this. I had also several customer asking that but couldn’t get an answer, which I now have a chnace...
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Like first time Spotlight get the value of “physical reads cache” from the database is 10000, and the second time it increase to 10180, then the value for Spotlight calculate is 180, same to ‘db block...
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Hi Kevin Thx for an answer. All clear now. Brg Damir Read full topic
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