       load1,
       load5,
       load15,
+      # CPU usage
+      cpu_total,
       # Memory
       memory_used,
       # Users

    name: 'load'
    source: '15:' + node_id
    value: loadavg[2]

  # Available memory
  mem_total = os.totalmem() / (1024 * 1024)

# Collect data from Mongo in every <interval>/2 seconds
setInterval ->
  collect_mongo()
, (interval / 2)

# Post to Librato in every <interval> seconds
setInterval ->
  post_to_librato()
, interval