Question

我对restlet服务器有一种奇怪的行为，我无法理解发生了什么！

我有一个服务，它使用mySQL数据库中的数据进行基本的字符串连接。

我的代码是：

private static void testWS() throws Exception {
Client client = new Client(Protocol.HTTP);

for (String id : listIds) {
    long startTime = System.nanoTime();
    Request request = new Request(Method.GET, REST_SERVICE + id);
    Response response = client.handle(request);
    long endTime = System.nanoTime();
    System.out.println("Duration  of WS call:" + ((endTime - startTime) / 1000000) + " ms");
    }
}

当我运行这批时，我有类似的东西：

Duration of WS call:128 ms
Duration of WS call:1015 ms
Duration of WS call:1069 ms

但是当同一批次同时在两台不同的计算机上运行时，我对这两个批处理都有这样的事情：

Duration of WS call:90 ms
Duration of WS call:92 ms
Duration of WS call:81 ms

当两个程序查询服务器而不是一个程序时，响应快10倍！

真实示例：在两台不同的计算机上运行相同的批处理：

+-----------------------------+----------------------------+
|           Batch 1           |          Batch 2           |
+-----------------------------+----------------------------+
| Duration of WS call:128 ms  |                            |    Start of Batch1
| Duration of WS call:1015 ms |                            |
| Duration of WS call:1010 ms |                            |
| Duration of WS call:1012 ms |                            |
| Duration of WS call:1031 ms |                            |
| Duration of WS call:1036 ms |                            |
| Duration of WS call:834 ms  |                            |
| Duration of WS call:90 ms   | Duration of WS call:75 ms  |    Start of Batch2
| Duration of WS call:92 ms   | Duration of WS call:82 ms  |
| Duration of WS call:81 ms   | Duration of WS call:85 ms  |
| Duration of WS call:89 ms   | Duration of WS call:82 ms  |
| Duration of WS call:146 ms  | Duration of WS call:90 ms  |
| Duration of WS call:92 ms   | Duration of WS call:85 ms  |
| Duration of WS call:85 ms   | Duration of WS call:76 ms  |
| Duration of WS call:28 ms   | Duration of WS call:96 ms  |
| Duration of WS call:165 ms  | Duration of WS call:88 ms  |
| Duration of WS call:78 ms   | Duration of WS call:84 ms  |
| Duration of WS call:85 ms   | Duration of WS call:63 ms  |
| Duration of WS call:103 ms  | Duration of WS call:37 ms  |
| Duration of WS call:129 ms  | Duration of WS call:74 ms  |
| Duration of WS call:73 ms   | Duration of WS call:140 ms |    Batch2 manually stopped
| Duration of WS call:1058 ms |                            |
| Duration of WS call:1016 ms |                            |
| Duration of WS call:1006 ms |                            |
| Duration of WS call:1020 ms |                            |
| Duration of WS call:1055 ms |                            |
| Duration of WS call:958 ms  |                            |
| Duration of WS call:1003 ms |                            |    End of Batch1
+-----------------------------+----------------------------+

对此有解释吗？

提前致谢。

Answer 1

我在org.restlet.jar中使用默认的HTTP服务器，似乎产生了奇怪的结果。由于我切换到Jetty，一切都按预期工作（平均响应时间为50-70毫秒）

java + restlet =奇怪的性能行为

1 个答案: