todo
only log when ok
debugging log
more clear stats
shorter log
validation
log
call per session
client control sampling rate

most host will be 1% while 1 host will be 100%
ignore logs
add Start method
change to a better name
more attr
only log answer if msg size is within limit
truncate value within size
modular profiler
auto trunc log value body
rearrange lines
watchdog keep watch on servant internal state
show server addr