What are cache hit and miss ratios?

What are cache hit and miss ratios?

Cache hit and miss ratios measure the effectiveness of a cache. A hit occurs when data is found in the cache, while a miss means it's not.

How do you calculate the hit ratio?

The hit ratio is calculated by dividing the number of cache hits by the total number of cache accesses (hits + misses).

What is a good hit ratio?

A good hit ratio typically ranges from 80% to 90%, but it can vary based on the application and workload.

What happens if the miss ratio is high?

A high miss ratio can lead to increased latency and reduced performance, as more requests have to be fetched from the main memory.

Can you give an example of improving cache performance?

Sure! Techniques like increasing cache size, optimizing data access patterns, and using better caching algorithms can improve performance.