File Cache Effectiveness

For each item (for example, Dir FCB), the effectiveness is computed as the ratio of (item hits)/(item hits + item misses) expressed as a percentage.

Dir FCB: The effectiveness of the directory cache for finding directory file control blocks.
Dir Data: The effectiveness of the directory cache for finding directory data.
Quota: The effectiveness of the quota cache.
File Id: The effectiveness of the file ID cache.
File Hdr: The effectiveness of the file header cache.
Extent: The effectiveness of the extend cache.
Bit Map: The effectiveness of the bit map cache.