Administering an ISP Installation

Out-of-Process Application Pooling

With IIS 5.0, ASP applications run in an out-of-process application pooling by default. When you create a virtual directory with the wizard in the IIS snap-in and then create applications to run in that directory, the applications will run in a separate process from IIS 5.0. The separate process is a special COM+ application, of which each pooled ASP application is a component.

The following guidelines will help you determine when to run applications in the pool for maximum stability and performance:

If you’re running 20 or fewer applications, run them out of process.
If you’re running 21 or more, add them to the pool.
Run a stateful application out of process.
If you’re running 20 or more applications, some stateful and some stateless, run the stateful ones out of process and add the stateless ones to the pool.

You can set the pooling parameter in the IIS snap-in, or through Adsutil.exe on the command line. For details about pooling and for procedures, see the IIS 5.0 online product documentation.