The AppAllowDebugging property specifies whether ASP debugging is enabled on the server. This property is independent of the AppAllowClientDebug property, which applies to client-side debugging.
IIS application threads are serialized when server-side debugging is enabled: Only one thread at a time is allowed to run for each application. This could adversely affect server performance on busy sites.
This property is an application-level property.
You can configure this property at the following locations in the IIS metabase.
IIS Admin Object Type
Client: Requires Windows XP Professional, Windows 2000 Professional, or Windows NT Workstation 4.0.
Server: Requires Windows Server 2003, Windows 2000 Server, or Windows NT Server 4.0.