jconsole - what does is measure?

[amcorona]

Anyone here have a howto on interpreting jconsole output?

When I look at ConnectionsRTMP I do not see any rejected connections.

Under IOPerfomanceRTMP I see a huge # under messageLossBytes but don't know what it is measuring.
I am running the load test tool remotely over VPN to the server. I suspect the all bottlenecks to be on my end since I am using comcast and my download speed probably can't support 300 threads to the server.

Client side is spitting out:

INFO server comment - Status running:300 currBehind:0
INFO server comment - Status running:300 currBehind:0
INFO server comment - Status running:300 currBehind:0


I see none behind but have no clue if currBehind has any relation to messageLossBytes.

edit: subject should read what does it measure.