     # 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_disk_usage_mb
+    # TYPE kucalc_project_disk_usage_mb gauge
+    kucalc_project_disk_usage_mb{#{labels}} #{current_status.disk_MB ? 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}

            else
                cnt = -1  # no need to account for the ps process itself!
                # TODO parsing anything out of ps is really hard :-(
                for line in out.stdout.split('\n')
                    if line.length > 0
                        cnt += 1

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