Windows Server 2012(虚拟机)中的IIS 8上的MVC 5应用程序非常慢(不仅在初始加载时) [英] MVC 5 application on IIS 8 in Windows Server 2012 (virtual machine) is very slow (not only on initial load)
问题描述
目标是在 Windows Server 2012 内的 IIS 8 上启动 MVC 5 Web应用程序(Microsoft评估的标准版) )在虚拟机(VMware Workstation 12 Player，免费版)中进行测试，以测试整个系统的发行版.
The goal is to launch an MVC 5 web app on an IIS 8 within a Windows Server 2012 (Standard edition for evaluation from Microsoft) in a virtual machine (VMware Workstation 12 Player, free version) in order to test the whole system for the release.
我设法运行了该应用程序，但问题是它的运行速度非常慢.例如. index.html是静态HTML 页面，需要 60秒以上才能加载.但为什么?在Visual Studio和IIS Express中，一切仍然可以正常运行.
I managed to run the application, but the problem is, that it´s extremely slow. E.g. the index.html is a static HTML page and needs more than 60 seconds to load. But why? In Visual Studio and IIS Express still everything works perfectly.
更多信息:
- 发布时，我预编译了该应用.您可以在下图中看到目录结构.我将这些文件放入
C:\inetpub\wwwroot\test".
- On publishing, I precompiled the app. You can see the directory structure in the image below. I put these files into
C:\inetpub\wwwroot\test".
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目标框架是 .NET 4.6 .因此，我已经安装了. NET 4.6程序包. DefaultAppPool 表示v4.0，但显然使用了正确的4.6版本.
The target framework is .NET 4.6. Therefore I´ve installed the .NET 4.6 package. The DefaultAppPool says v4.0, but apparently uses the correct 4.6 version.
为了进行测试，我已将另一个应用程序添加到了相同的应用程序池中-即C:\inetpub\wwwroot\test2"-在其中放置了hello-world index.html.它加载速度很快.因此，我希望MVC5有一个问题.
For testing I´ve added another application to the same application pool - i.e. C:\inetpub\wwwroot\test2" - where I put a hello-world index.html. It loads fast. Therefore I expect a problem with MVC5.
Windows Server 2012在虚拟机中运行.我为VM提供了4GB RAM和6个CPU内核(超线程)，但这并没有帮助.任务管理器显示 5％CPU 和 25％RAM消耗.因此，我认为问题出在IIS 中.
The Windows Server 2012 is running in a virtual machine. I gave the VM 4GB RAM and 6 CPU Cores (hyperthreaded), but it didn´t help. The task manager shows a 5% CPU and 25% RAM consumption. Therefore I assume that the problem lies in the IIS.
非常感谢您的帮助！
推荐答案
谢谢，我终于找到了问题:我使用Sql Server LocalDb ，它是文件系统. 应用程序池的标识设置为 ApplicationPoolIdentity ，我不得不将其更改为 LocalSystem .现在，应用程序池可以访问数据库，并且IIS可以正常运行.
Thanks, I have finally found the problem: I use the Sql Server LocalDb, which is a local .mdf-file in the filesystem. The Application Pool´s Identity was set to ApplicationPoolIdentity and I had to change it to LocalSystem. Now the application pool can access the database and the IIS runs as it should.
让我感到惊讶的是，即使IIS不需要数据库来加载index.html，它显然也试图立即建立连接.失败60秒钟后，它说:"我无法连接，所以我将在没有数据库的情况下进行尝试." 并继续加载.万一不需要数据库，它就可以工作.我猜这是由于DB-Connection-Pooling造成的.
What surprised me is, that even though the IIS didn´t need the database to load the index.html, it apparently tried to establish a connection right away. After unsuccessful 60s it said, "Well I couldn´t connect, so I will try it without the database." and continued loading. In case the database was not needed, it worked. I guess that happens due to the DB-Connection-Pooling.
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