scrape T0
  node-1 T0 parsed 8 memory counters
  node-2 T0 parsed 8 memory counters
  node-3 T0 parsed 7 memory counters
settle 5s for counter update
scrape T1
  node-1 T1 parsed 8 memory counters
  node-2 T1 parsed 8 memory counters
  node-3 T1 parsed 7 memory counters