Use the Application Pools feature page to manage a list of application pools on a Web server.

Sort the list by clicking one of the feature page column headings or select a value from the Group by drop-down list to group similar items. Search the list by typing search criteria in the Filter box, expand the Go list to select the field on which to search, and then click Go or press ENTER. Click Show All to remove the filter criteria.

UI Element List

The following tables describe the UI elements that are available on the feature page and in the Actions pane.

Feature Page Elements

Element Name Description


Displays the name of each application pool.


Displays whether or not an application pool is started.

.NET Framework Version

Displays the version of the .NET Framework that an application pool uses. If the application pool was configured to not use the .NET Framework, the value is No Managed Code.

Managed Pipeline Mode

Displays the request-processing mode that an application pool uses.

Values can be Integrated or Classic. When the value is Integrated, IIS uses the integrated IIS and ASP.NET request-processing pipeline to process requests in the application pool. When the value is Classic, IIS uses separate IIS and ASP.NET request-processing pipelines to process requests in the application pool.


Displays the identity used by an application pool. Values can be Network Service, Local Service, Local System, or the name of the user account for a custom identity.


Displays the number of applications that an application pool contains.

Actions Pane Elements

Element Name Description

Add Application Pool

Opens the Add Application Pool dialog box from which you can add an application pool to the Web server.

Set Application Pool Defaults

Opens the Application Pool Defaults dialog box from which you can set default values that apply to all application pools that you add to the Web server.


Starts the selected application pool.


Stops the selected application pool. This causes the Windows Process Activation Service (WAS) to shut down all running worker processes serving that application pool. An administrator must restart a stopped application pool or else requests made to applications in that application pool will receive HTTP 503-Service Unavailable errors.


Stops and restarts the selected application pool. Restarting an application pool causes the application pool to be temporarily unavailable until the restart is complete.

Basic Settings

Opens the Edit Application Pool dialog box from which you can edit the settings that were specified when the application pool was created. This action is available only when an item is selected from the list on the feature page.


Opens the Edit Application Pool Recycling Settings wizard from which you can specify conditions under which to recycle an application pool and configure how recycling events are logged.

Advanced Settings

Opens the Advanced Settings dialog box from which you can configure advanced settings for the selected application pool.


Enables the Name field of the selected application pool so that you can rename the application pool.


Removes the item that is selected from the list on the feature page.


You cannot remove an application pool that contains applications. You must move any applications out of the application pool before you can remove it.

View Applications

Opens the Applications feature page from which you can view the applications that belong to the selected application pool.

See Also