Major Description
This is a known problem, but all per-partition stats for bytes_used are always zero, e.g.
proxy.process.cache.partition_0.bytes_used=0
This was change a while ago, where before the change, these settings would actually show the same numbers as the total bytes_used (across all partitions). I thought that made even less sense, since typically those numbers would be larger than the available space on each individual partition.
We should try to fix this though.