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hit rate

hit rate
1. The fraction of references to one level of the memory hierarchy that must otherwise be fulfilled in the less accessible levels within the hierarchy. Thus for a cache memory the hit rate is the fraction of references that do not result in access to main memory. For a page the hit rate is the fraction of references that do not result in a page turn.

2. The proportion of records or blocks on a file that are retrieved or updated in a batch run or in a given period of time.

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