Azure Websites AppDomain many restarts

I've a group of asp.net 4.0 Websites runing in Azure Websites - Compute mode: Standard - Location: North Europe - Capacity autoscale: Off - Instance size: Large - Instance Count: 1 The response time is very slow, the trafic is normal, but my log show many AppDomain shutdowns (more than 3 in one minute). My websites load data in cache during de Application_Start to give a rapid response to all subsequents requests but if the Appdomains restarts every time is impossible to give acceptable response times. The ShutdownReason values are many: - ConfigurationChange - HostingEnvironment - CodeDirChangeOrDirectoryRename - BinDirChangeOrDirectoryRename - BrowsersDirChangeOrDirectoryRename This have no sense because I've not changed any file in these folders. I've tested one of these sites in a free mode running very fast and without any unexpected AppDomain restart. Thanks. Update: I've included this code in the Application_Start, no file changes have been detected and the AppDomain is restarting again, and again... ``` 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; ``` Update 07/15/2013: using the code from the ScottGu article http://weblogs.asp.net/scottgu/archive/2005/12/14/433194.aspx I have logged this: ``` _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() ``` Update 07/19/2013: The metric Data-In is very high and has no relation with the requests metric, but when I configure the setting fcnMode=”Disabled” the data-In immediately down to normal values accord with the traffic.