i have enabled the plugin . and i noticed that if background_fill threshold is anything other than 0.0 it won't work.
but if i use background threshold value of 0.0 then i would be consuming more bandwidth than actually serving.
and if background fill threshold set to 0.0 read_while_writer will always collapse connections and thus no need for the plugin.
so can Collapsed_connection work if background_fill_threshold is for example 0.5 ? that would trigger lots of usefulness.