The title is Percentage of Unused Blocks, but hte pop-up tool tip says “Fraction of Key Cache in use”.
So the first is % not in use, but tool-tip says % in use ?
I would prefer, it to be % in use.
((key_buffer_size/key_cache_block_size)-key_blocks_unused)/(key_buffer_size/key_cache_block_size)
i.e. higher is better, rather than lower is better. Low means its too big for the data needs
Bruce Leister