cache hit rate

The rate of cache hits versus cache misses, followed by the actual number of hits and misses. A cache hit occurs when the user wants to perform an operation on a file or files, and the file or files are actually in the cache. A cache miss occurs when the file is not in the cache. The load on the server is the sum of cache misses, consistency checks, and modifications (modifies). 

consistency checks

The number of consistency checks performed, followed by the number that passed, and the number that failed. 

modifies

The number of modify operations. For example, writes or creates.