void decrMemStoreSize(MemStoreSize mss) {
    decrMemStoreSize(mss.getDataSize(), mss.getHeapSize(), mss.getOffHeapSize(),
      mss.getCellsCount());
  }
Increase the size of mem store in this region and the size of global mem store
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java