anchor.diff:          is_compacting = false,
           buffer_converter = {ConverterSup, undefined},
           stream_range_pids = [],
  -        buffer_rollover_size=element(2,application:get_env(merge_index, buffer_rollover_size))
  +        buffer_rollover_size=semi_random_rollover_size()
       },
   
       %% %% Do some profiling.
  
positive.code: 
  -define(RESULTVEC_SIZE, 1000).
  -define(DELETEME_FLAG, ".deleted").
  -define(ROLLOVER_SIZE(S), S#state.buffer_rollover_size).
  
  register_buffer_converter(ServerPid, ConverterPid) ->
      gen_server:cast(ServerPid, {register_buffer_converter, ConverterPid}).
  
negative.code:     %% Update the state...
      NewState = State#state {buffers = [CurrentBuffer | Buffers]},
  
      %% Possibly dump buffer to a new segment. 
      case mi_buffer:filesize(CurrentBuffer) > State#state.buffer_rollover_size of
          true ->
              #state { next_id=NextID } = NewState,
              
  