Why Are Cache-Hit Ratios Grossly Inefficient?
The hit ratio philosophy is not peculiar to Oracle database administration. It is widely used and ingrained in many aspects of our daily lives. Take your local city water department for example. Their goal is to keep your drinking water quality within the limits that are established by the Environmental Protection Agency. Now, your city may meet or exceed the established limits, but that doesn’t mean that everyone is happy. Some people are more vulnerable to substances found in drinking water than the general population. And if you are one of the unfortunate ones, you have to work out your own alternative. Chances are your city is not going to do anything about it if the water quality is already within ...
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