How do you get a cache hit?
For example, if a CDN has 39 cache hits and 2 cache misses over a given timeframe, then the cache hit ratio is equal to 39 divided by 41, or 0.951. The cache hit ratio can also be expressed as a percentage by multiplying this result by 100. As a percentage, this would be a cache hit ratio of 95.1%.
What do you mean by cache hit and miss?
A cache miss, generally, is when something is looked up in the cache and is not found – the cache did not contain the item being looked up. The cache hit is when you look something up in a cache and it was storing the item and is able to satisfy the query.
What is a good cache hit rate?
A cache hit ratio of 90% and higher means that most of the requests are satisfied by the cache. A value below 80% on static files indicates inefficient caching due to poor configuration.
What is cache hit time?
Two other terms used in cache performance measurement are the hit time—the time it takes to access a memory location in the cache and the miss penalty—the time it takes to load a cache line from main memory into cache.
What is miss penalty in cache?
Miss penalty is defined as the difference between lower level access time and cache access time.
How does cache size affect hit rates?
If you access many files and you have a large cache, you will have a larger cache-hit rate because older information still remains in the cache during consistency checks. However, if you have a small cache, there is less room for information to remain. You will experience more misses and a lower cache-hit rate.
What is the smallest memory?
A byte is the smallest unit of memory used in today’s computing. Bytes consist of eight bits, and a byte is used to encode a single number, letter, or symbol.
Which is the slowest memory in computer?
Answer: A typical computer has 3 types of memory: Cache memory, Random Access Memory (RAM), and virtual memory. Cache is the fastest and most expensive, RAM is slower and less expensive, and virtual memory is the slowest and least expensive type.