Miss rate is a crucial metric used to evaluate the performance of cache memory systems, representing the fraction of memory accesses that do not find the requested data in the cache. A lower miss rate indicates a more efficient cache, which can significantly improve overall system performance by reducing access time to main memory. It is closely tied to various features such as cache size, associativity, and replacement policies, all of which can influence how effectively a cache can fulfill requests and how well it predicts future data needs.
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