# Package org.apache.storm.metric.internal

- Class Summary
  Class | Description
  --- | ---
  CountStat | Keeps track of approximate counts for the last 10 mins, 3 hours, 1 day, and all time.
  LatencyStat | Keeps track of approximate latency for the last 10 mins, 3 hours, 1 day, and all time.
  MultiCountStat<T> | Acts as a MultiCount Stat, but keeps track of approximate counts for the last 10 mins, 3 hours, 1 day, and all time.
  MultiLatencyStat<T> | Keeps track of approximate latency for the last 10 mins, 3 hours, 1 day, and all time.
  RateTracker | This class is a utility to track the rate of something.