What Is Cache Miss Rate

The miss rate is similar in form: the total cache misses divided by the total number of memory requests expressed as a percentage over a time interval. Note that the miss rate also equals 100 minus the hit rate.

What is miss in cache memory?

A cache miss is an event in which a system or application makes a request to retrieve data from a cache, but that specific data is not currently in cache memory. … A cache miss requires the system or application to make a second attempt to locate the data, this time against the slower main database.

What causes high miss rate cache memory?

For small caches, such as the 4 KiB cache, increasing the block size beyond 64 bytes increases the miss rate because of conflicts. … However, large block sizes might still increase execution time because of the larger miss penalty, the time required to fetch the missing cache block from main memory.