             else
                 cnt = -1  # no need to account for the ps process itself!
                 # TODO parsing anything out of ps is really hard :-(
+                # but we want to know how many sage, jupyter, console, etc. instances are running.
                 for line in out.stdout.split('\n')
                     if line.length > 0
                         cnt += 1

    # HELP kucalc_project_cpu_usage_seconds
    # TYPE kucalc_project_cpu_usage_seconds counter
    kucalc_project_start_time{#{labels}} #{current_status.cpu?.usage ? 0.0}
    # HELP kucalc_project_memory_usage_ki
    # TYPE kucalc_project_memory_usage_ki gauge
    kucalc_project_memory_usage_ki{#{labels}} #{current_status.memory?.rss ? 0.0}

        (cb) ->
            compute_status (err, s) ->
                status = s
                if not err
                    current_status = s
                cb(err)
        (cb) ->
            client.query
