acceptor.getFilterChain().addLast("threadPool", new ExecutorFilter(Executors.newCachedThreadPool()));
IoBuffer.setUseDirectBuffer(false); // 此条貌似效果不明显
IoBuffer.setAllocator(new SimpleBufferAllocator());// 此条貌似效果不明显

@Override  
    public void sessionCreated(IoSession session) throws Exception {  
        SocketSessionConfig cfg = (SocketSessionConfig) session.getConfig();  
        cfg.setReceiveBufferSize(2 * 1024 * 1024);  
        cfg.setReadBufferSize(2 * 1024 * 1024);  
        cfg.setKeepAlive(true);   // 此条在UDP的情况下没有意义，除非使用MINA自身的Keep Alive机制
        cfg.setSoLinger(0);   
    }