Hit Probability

Hit probability refers to the likelihood that a system, such as a cache or memory, successfully retrieves the needed data on the first attempt. For example, if a computer's cache has a high hit probability, it means most of the time the data it needs is already stored there, allowing for faster access. Conversely, a low hit probability indicates frequent data misses, requiring the system to access slower main memory. Essentially, it measures the efficiency and effectiveness of the cache in providing quick data access, impacting overall system performance.