By default, FDM 9.0.2 and later use IIS memory recycling to force the Microsoft.NET process to recycle memory when the process reaches 250 MB (Windows 2003) . These values are based on a Web Server running 2 GB of RAM. For servers running 4 GB of RAM, adjust the settings to 15–200 MB (Windows 2003). For servers with 4 GB or more of RAM, it is extremely important that the default memory limit be adjusted.
By default, FDM 9.x use aspnet_state service to store session values while the IIS memory recycling process is running. The service must be running on the Web Server for FDM to operate correctly.