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我正在查看一个 asp.net 应用程序，该应用程序在 global.asax 内部开始调用应用程序内的数据库。这些调用运行大约需要 3 秒（取决于 SQL 缓存计划）。我注意到当我第一次重新部署时应用程序运行缓慢。我把它归结为应用程序启动时对数据库的调用。然而，几分钟后，应用程序再次需要时间来加载。

为了找出发生了什么，我已经写入了一个日志文件（见下文）。从这个文件中，您可以看到当多个请求第一次命中应用程序时，应用程序启动会多次触发。然后似乎 application_start 以随机方式触发（2-10分钟内的任何时间）。

根据我对 application_starts 工作原理的理解，它应该只在应用程序 FIRST 启动时触发，但它似乎是从多个客户端随机触发的！根据 MSDN “应用程序启动时第一次触发 Application_Start 事件。”

谁能帮我弄清楚发生了什么？我正在使用 IIS6 和 .net 2.0。它是我缺少的应用程序池设置吗？

非常感谢里波

[12/02/2009 16:16:58] 91.84.25.241 - Application started, Sub MyRules started
[12/02/2009 16:17:06] 65.55.51.34 - Application started, Sub MyRules started
[12/02/2009 16:17:07] 91.84.25.241 - Application started, Sub MyRules completed
[12/02/2009 16:17:10] 65.55.51.34 - Application started, Sub MyRules completed
[12/02/2009 16:17:26] 212.115.51.229 - Application started, Sub MyRules started
[12/02/2009 16:17:30] 212.115.51.229 - Application started, Sub MyRules completed
[12/02/2009 16:17:30] 212.115.51.229 - Application started, Sub MyRules started
[12/02/2009 16:17:33] 212.115.51.229 - Application started, Sub MyRules completed
[12/02/2009 16:17:33] 212.115.51.229 - Application started, Sub MyRules started
[12/02/2009 16:17:36] 212.115.51.229 - Application started, Sub MyRules completed
[12/02/2009 16:17:36] 212.115.51.229 - Application started, Sub MyRules started
[12/02/2009 16:17:39] 212.115.51.229 - Application started, Sub MyRules completed
[12/02/2009 16:17:42] 212.115.51.229 - Application started, Sub MyRules started
[12/02/2009 16:17:48] 212.115.51.229 - Application started, Sub MyRules completed
[12/02/2009 16:17:48] 212.115.51.229 - Application started, Sub MyRules started
[12/02/2009 16:17:52] 212.115.51.229 - Application started, Sub MyRules completed
[12/02/2009 16:17:52] 212.115.51.229 - Application started, Sub MyRules started
[12/02/2009 16:17:54] 212.115.51.229 - Application started, Sub MyRules completed
[12/02/2009 16:18:27] 91.84.25.241 - Application started, Sub MyRules started
[12/02/2009 16:18:31] 91.84.25.241 - Application started, Sub MyRules completed
[12/02/2009 16:18:31] 212.115.51.229 - Application started, Sub MyRules started
[12/02/2009 16:18:33] 212.115.51.229 - Application started, Sub MyRules completed
[12/02/2009 16:29:26] 167.230.38.115 - Application started, Sub MyRules started
[12/02/2009 16:29:28] 167.230.38.115 - Application started, Sub MyRules completed
[12/02/2009 16:29:34] 82.110.42.84 - Application started, Sub MyRules started
[12/02/2009 16:29:37] 82.110.42.84 - Application started, Sub MyRules completed
[12/02/2009 16:29:38] 82.110.42.84 - Application started, Sub MyRules started
[12/02/2009 16:29:41] 82.110.42.84 - Application started, Sub MyRules completed
[12/02/2009 16:32:53] 99.142.1.97 - Application started, Sub MyRules started
[12/02/2009 16:32:57] 99.142.1.97 - Application started, Sub MyRules completed
[12/02/2009 16:32:57] 99.142.1.97 - Application started, Sub MyRules started
[12/02/2009 16:33:01] 99.142.1.97 - Application started, Sub MyRules completed
[12/02/2009 16:33:01] 99.142.1.97 - Application started, Sub MyRules started
[12/02/2009 16:33:06] 99.142.1.97 - Application started, Sub MyRules completed
[12/02/2009 16:33:06] 99.142.1.97 - Application started, Sub MyRules started
[12/02/2009 16:33:10] 99.142.1.97 - Application started, Sub MyRules completed
[12/02/2009 16:33:11] 99.142.1.97 - Application started, Sub MyRules started
[12/02/2009 16:33:16] 99.142.1.97 - Application started, Sub MyRules completed
[12/02/2009 16:36:15] 65.55.51.34 - Application started, Sub MyRules started
[12/02/2009 16:36:17] 65.55.51.34 - Application started, Sub MyRules completed
[12/02/2009 16:41:37] 119.123.226.156 - Application started, Sub MyRules started
[12/02/2009 16:41:37] 62.49.121.122 - Application started, Sub MyRules started
[12/02/2009 16:41:40] 62.49.121.122 - Application started, Sub MyRules completed
[12/02/2009 16:41:40] 119.123.226.156 - Application started, Sub MyRules completed
[12/02/2009 16:41:41] 62.49.121.122 - Application started, Sub MyRules started
[12/02/2009 16:41:44] 62.49.121.122 - Application started, Sub MyRules completed
[12/02/2009 16:45:17] 84.70.249.242 - Application started, Sub MyRules started
[12/02/2009 16:45:19] 84.70.249.242 - Application started, Sub MyRules completed
[12/02/2009 16:47:03] 80.41.121.68 - Application started, Sub MyRules started
[12/02/2009 16:47:05] 80.41.121.68 - Application started, Sub MyRules completed
[12/02/2009 16:47:29] 81.179.26.249 - Application started, Sub MyRules started
[12/02/2009 16:47:31] 81.179.26.249 - Application started, Sub MyRules completed
[12/02/2009 16:47:59] 81.136.179.170 - Application started, Sub MyRules started
[12/02/2009 16:47:59] 81.136.179.170 - Application started, Sub MyRules started
[12/02/2009 16:48:02] 81.136.179.170 - Application started, Sub MyRules completed
[12/02/2009 16:48:02] 81.136.179.170 - Application started, Sub MyRules started
[12/02/2009 16:48:02] 81.136.179.170 - Application started, Sub MyRules completed
[12/02/2009 16:48:02] 81.136.179.170 - Application started, Sub MyRules started
[12/02/2009 16:48:04] 81.136.179.170 - Application started, Sub MyRules completed
[12/02/2009 16:48:04] 81.136.179.170 - Application started, Sub MyRules completed
[12/02/2009 16:52:35] 69.34.161.80 - Application started, Sub MyRules started
[12/02/2009 16:52:35] 69.34.161.80 - Application started, Sub MyRules started
[12/02/2009 16:52:35] 69.34.161.80 - Application started, Sub MyRules started
[12/02/2009 16:52:38] 69.34.161.80 - Application started, Sub MyRules completed
[12/02/2009 16:52:38] 69.34.161.80 - Application started, Sub MyRules started
[12/02/2009 16:52:39] 69.34.161.80 - Application started, Sub MyRules completed
[12/02/2009 16:52:39] 69.34.161.80 - Application started, Sub MyRules completed
[12/02/2009 16:52:40] 69.34.161.80 - Application started, Sub MyRules completed
4

5 回答 5

16

检查应用程序在什么情况下会重新启动。最近我们正在向 bin 文件夹写入一些日志条目，并且发生了完全相同的事情，我们不明白原因。然后终于意识到对 bin 文件夹进行任何修改都会导致应用程序重新启动。

于 2009-02-12T18:32:48.460 回答
2

检查事件日志，某些原因导致应用程序池回收。

于 2009-02-12T17:17:57.017 回答
2

我在多次调用 Application_Start 时遇到问题，事实证明这是因为我设置了多个实例。愚蠢的错误，但我想指出它。

于 2010-11-24T19:12:06.637 回答
1

我不知道为什么，但我在我的日志中看到了同样的事情。可能是因为它花费的时间太长并且您同时有多个请求？无论如何，为了安全起见，我添加了以下代码：

public class MvcApplication : HttpApplication
{
    private static volatile bool hasRegisteredBgTasks = false;
    private static object registeredBgTasksLock = new object();

    protected void Application_Start()
    {
        lock (registeredBgTasksLock)
        {
            if (hasRegisteredBgTasks)
            {
                return;
            }
            // Actual start up code.
            hasRegisteredBgTasks = true;
        }
    }

    // Other Application methods...
}
于 2012-08-31T22:13:19.677 回答
0

原来是一个泄漏的dll...

于 2009-07-11T17:18:13.993 回答