如何防止IIS在不使用时关闭网站？ [英] How to prevent IIS from shutting down Web Site when not in use?

问题描述

我在IIS下托管了一个Web应用程序。它是一个数据仓库，在启动过程中需要在内存中实例化大量项目（大约需要20分钟才能完全设置）。由于此网站对我们公司至关重要，因此该系统必须在白天在线100％，并且只能在下班时间重新启动。

I have a web application hosted under IIS. It is a data warehouse, and during its startup process it requires instantiating a large set of items in memory (takes roughly ~20 minutes to fully set up). Because this website is critical to our company, this system must be online 100% during the daytime, and only can be restarted during off-work hours.

出于某种原因，当一段时间没有使用时，这个Web应用程序似乎是离线的。我知道这一点，因为访问网站时缓存未完全实例化。这是不可接受的。

For some reason, this web application seems to be "offline" when there is no usage for some time. I know this because the cache is not fully instantiated when the website is visited. This is unacceptable.

我不清楚为什么该网站被关闭。应用程序池仅设置为每天凌晨4:00（现在是上午11点）进行回收。

It is not clear to me why the website is shut off. The application pool is only set to recycle daily at 4:00 AM (it is 11 AM now).

IIS部件上是否还有其他我不知道的设置导致它自动关闭网站？

Are there other settings which I'm not aware of on the IIS part that causes it to shut down the website automatically?

Addl注意：在Visual Studio中的 IISExpress 中运行时，网站不会自动关闭。只有IIS上托管的生产版本才会关闭。

Addl Note: The website does not shut off automatically when running in IISExpress in Visual Studio. Only the production version hosted on IIS shuts off.

这是运行网站的应用程序池的高级设置屏幕。 （不确定它是否有用。）

Here's a screen of the Advanced Settings for the Application Pool the web site is running under. (Not sure if it's useful.)

I我在IIS 7.5，Server 2008 R2上。它是一个ASP.NET 5 Web应用程序。

I'm on IIS 7.5, Server 2008 R2. It is an ASP.NET 5 Web App.

推荐答案

检查屏幕截图中流程模型下的空闲超时设置。该设置导致应用程序池在闲置20分钟后关闭。您可以将其设置为0以使其始终保持运行，即使它处于空闲状态，即不处理任何请求。

Check Idle Time-out settings under process model in screenshot. That setting is causing app pool shutting down when remain idle for 20 mins. You can set it to 0 to keep it running all time even when its idle i.e. not processing any requests.

注意：保持应用程序池一直运行将消耗服务器的宝贵内存。如果应用程序泄漏内存，它可能会变得至关重要。

Note: Keeping app pool running all time will consume server's precious memory. It may become critical especially if application is leaking memory.

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