什么是Application Pool？

 It is the new features in IIS 6.0. An Application Pool can contain one or more applications and allows us to configure a level of isolation between different Web applications. For example, if you want to isolate all the Web applications running in the same computer, you can do this by creating a separate application pool for every Web application and placing them in their corresponding application pool. Because each application pool runs in its own worker process, errors in one application pool will not affect the applications running in other application pools. Deploying applications in application pools is a primary advantage of running IIS 6.0 in worker process isolation mode because you can customize the application pools to achieve the degree of application isolation that you need

应用程序池是将一个或多个应用程序链接到一个或多个工作进程集合的配置。因为应用程序池中的应用程序与其他应用程序被工作进程边界分隔，所以某个应用程序池中的应用程序不会受到其他应用程序池中应用程序所产生的问题的影响。