void _chore() {
    final RegionServerSpaceQuotaManager quotaManager =
      rsServices.getRegionServerSpaceQuotaManager();
    // Get the HRegionInfo for each online region
    HashSet<RegionInfo> onlineRegionInfos = getOnlineRegionInfos(rsServices.getRegions());
    RegionSizeStore store = quotaManager.getRegionSizeStore();
    // Remove all sizes for non-online regions
    removeNonOnlineRegions(store, onlineRegionInfos);
    rsServices.reportRegionSizesForQuotas(store);
  }
A Chore which sends the region size reports on this RegionServer to the Master.
hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/RegionSizeReportingChore.java