private boolean refreshStoreFilesAndReclaimMemory(Region region) {
    try {
      return region.refreshStoreFiles();
    } catch (IOException e) {
      LOG.warn("Refreshing store files failed with exception", e);
    }
    return false;
  }
Returns Return memstore data size or null if <code>r</code> is null
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.java