    # File lib/mongrel/handlers.rb, line 352
        def process(request, response)
          if rand(@sample_rate)+1 == @sample_rate
            @processors.sample(listener.workers.list.length)
            @headcount.sample(request.params.length)
            @reqsize.sample(request.body.length / 1024.0)
            @respsize.sample((response.body.length + response.header.out.length) / 1024.0)
          end
          @interreq.tick
        end