@Override
  public long getHedgedReadOpsInCurThread() {
    return this.dfsHedgedReadMetrics == null
      ? 0
      : this.dfsHedgedReadMetrics.getHedgedReadOpsInCurThread();
  }
This is the runnable that will be executed on the executor every PERIOD number of seconds It
will take metrics/numbers from all of the regions and use them to compute point in time
metrics.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MetricsRegionServerWrapperImpl.java