我有一组在Azure 网站中运行的 asp.net 4.0 网站
- 计算模式：标准
- 地点：北欧
- 容量自动缩放：关闭
- 实例大小：大
- 实例数：1
响应时间很慢，流量正常，但是我的日志显示很多AppDomain 关闭（一分钟内超过 3 次）。我的网站在 de Application_Start 期间将数据加载到缓存中，以快速响应所有后续请求，但如果 Appdomains 每次都重新启动，则不可能提供可接受的响应时间。
ShutdownReason值很多：
- 配置更改
- 托管环境
- CodeDirChangeOrDirectoryRename
- BinDirChangeOrDirectoryRename
- 浏览器目录更改或目录重命名
这没有任何意义，因为我没有更改这些文件夹中的任何文件。
我已经在运行非常快且没有任何意外 AppDomain 重启的免费模式下测试了其中一个站点。
谢谢。
更新：
我已将此代码包含在 Application_Start 中，未检测到文件更改，并且 AppDomain 再次重新启动，并且再次...
var monitorPath = HostingEnvironment.MapPath("~/");
Application.Add("watcher", new FileSystemWatcher(monitorPath));
fsw = (FileSystemWatcher) Application["watcher"];
fsw.EnableRaisingEvents = true;
fsw.IncludeSubdirectories = true;
fsw.Changed += fsw_Changed;
fsw.Created += fsw_Created;
fsw.Deleted += fsw_Deleted;
fsw.Renamed += fsw_Renamed;
2013 年 7 月 15 日更新：
使用 ScottGu 文章http://weblogs.asp.net/scottgu/archive/2005/12/14/433194.aspx中的代码
我已经记录了这个：
_shutDownMessage=Directory rename change notification for 'C:\DWASFiles\Sites\my-sitename\VirtualDirectory0\site\wwwroot'.
File Change Notification Error in wwwroot
HostingEnvironment initiated shutdown
Change Notification for critical directories.
File Change Notification Error in App_GlobalResources
Change Notification for critical directories.
File Change Notification Error in bin
Change Notification for critical directories.
File Change Notification Error in App_Browsers
Change Notification for critical directories.
File Change Notification Error in App_Code
Change Notification for critical directories.
File Change Notification Error in App_WebReferences
CONFIG change
CONFIG change
CONFIG change
CONFIG change
CONFIG change
CONFIG change
CONFIG change
CONFIG change
CONFIG change
CONFIG change
File Change Notification Error in C:\DWASFiles\Sites\my-sitename\VirtualDirectory0\site\wwwroot
CONFIG change
File Change Notification Error in
HostingEnvironment caused shutdown
File Change Notification Error in
Change Notification for critical directories.
File Change Notification Error in App_LocalResources
Change Notification for critical directories.
File Change Notification Error in App_LocalResources
CONFIG change
_shutDownStack= at System.Environment.GetStackTrace(Exception e, Boolean needFileInfo)
at System.Environment.get_StackTrace()
at System.Web.Hosting.HostingEnvironment.InitiateShutdownInternal()
at System.Web.Hosting.HostingEnvironment.InitiateShutdownWithoutDemand()
at System.Web.HttpRuntime.ShutdownAppDomain(String stackTrace)
at System.Web.HttpRuntime.OnCriticalDirectoryChange(Object sender, FileChangeEvent e)
at System.Web.FileChangesMonitor.OnSubdirChange(Object sender, FileChangeEvent e)
at System.Web.DirectoryMonitor.FireNotifications()
at System.Web.Util.WorkItem.CallCallbackWithAssert(WorkItemCallback callback)
at System.Web.Util.WorkItem.OnQueueUserWorkItemCompletion(Object state)
at System.Threading.QueueUserWorkItemCallback.WaitCallback_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
at System.Threading.ThreadPoolWorkQueue.Dispatch()
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()
2013 年 7 月 19 日更新：
指标Data-In非常高，与请求指标无关，但是当我配置设置 fcnMode=”Disabled” 时，data-In 立即降至正常值，符合流量。