File Cache Hit Ratio (Cache Hits / Cache Lookups)

The hit ratio available through perfdump gives you the number of file cache hits compared to cache lookups. Numbers approaching 100% indicate that the file cache is operating effectively, while numbers approaching 0% indicate that the file cache is not serving many requests.

To figure this number yourself using the statistics provided through the Admin Console, divide the Total Cache Hits by the sum of the Total Cache Hits and the Total Cache Misses.

This setting is not tunable.