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A cache hit is a state in which data requested for processing by a component or application is found in the cache memory. It is a faster means of delivering data to the processor, as the cache already contains the requested data.
A cache hit occurs when an application or software requests data. First, the central processing unit (CPU) looks for the data in its closest memory location, which is usually the primary cache. If the requested data is found in the cache, it is considered a cache hit.
A cache hit serves data more quickly, as the data can be retrieved by reading the cache memory. The cache hit also can be in disk caches where the requested data is stored and accessed at first query.