protected MemcachedClient createMemcachedClient(ConnectionFactory factory,
    List<InetSocketAddress> serverAddresses) throws IOException {
    return new MemcachedClient(factory, serverAddresses);
  }
Statistics thread schedule pool (for heavy debugging, could remove)
hbase-external-blockcache/src/main/java/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.java