Elasticsearch RestClient Slow Concurrency Slow Performance

HttpAsyncResponseConsumerFactory.HeapBufferedResponseConsumerFactory consumerFactory =        new HttpAsyncResponseConsumerFactory.HeapBufferedResponseConsumerFactory(30 * 1024 * 1024);

Response response = ElasticsearchProperties.restClient.performRequest(

"GET",        

"/"+index+"/_search",       

 new HashMap<String, String>(),        

new NStringEntity(queryJson, ContentType.APPLICATION_JSON),consumerFactory);

高并发后ES请求时间比ES查询的took时间长了非常多，并且更多并发并不能提升效率

目前设置如下：

private static final int CONNECT_TIME_OUT = 1000;

private static final int SOCKET_TIME_OUT = 30000;

private static final int CONNECTION_REQUEST_TIME_OUT = 500;

private static final int MAX_CONNECT_NUM = 10000;

private static final int MAX_CONNECT_PER_ROUTE = 1000;