public void update(RegionLoadStats regionStatistics) {
      this.memstoreLoadHist.update(regionStatistics.getMemStoreLoad());
      this.heapOccupancyHist.update(regionStatistics.getHeapOccupancy());
    }
A container class for collecting details about the RPC call as it percolates.
hbase-client/src/main/java/org/apache/hadoop/hbase/client/MetricsConnection.java