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### Using IIS Application Pool

IIS Application Pool contains all web applications on domains hosted on your server. Dedicated IIS application pool allows your clients to have a level of isolation between web applications used by their domains. Since each dedicated application pool runs independently, errors in one application pool belonging to one client will not affect the applications running in other application pools belonging to other clients.

By default, Plesk offers a shared application pool for all your clients and their customers. However, clients and domains can use dedicated application pools if administrator and client policy permit this.

To stop all applications in the domain's application pool:

1. Click the Domains shortcut in the navigation pane and click the required domain name.
2. Click IIS Application Pool.
3. Click Stop.

To start all applications in the domain's application pool:

1. Click the Domains shortcut in the navigation pane and click the required domain name.
2. Click IIS Application Pool.
3. Click Start.

To restart all applications running in the domain's application pool:

1. Click the Domains shortcut in the navigation pane and click the required domain name.
2. Click IIS Application Pool.
3. Click Recycle. This can be handy if some applications are known to have memory leaks or become unstable after working for a long time.

In this section: Setting Up IIS Application Pool Disabling IIS Application Pool