I was hoping someone could help me with interpreting the Current Activity
statistics. I've tweaked our new BM 3.8 server and have been up for about 5
days now.

Filled from Origin: 91931 Thru a proxy: 0 Failed 4010
Is this something I should be concerned about? What does this mean?

Cache hits 49% Hot: 58958 Cold: 22707 Fill waits: 0 Cache misses 83723
Surely this doesn't mean 49% of our http/s proxy traffic is coming from
cache. What does this percentage mean? Is it the percentage of cacheable
www responses?