Administration Service
         The Administration Service is an
            application service that provides functionality for administering repository content,
            user management, OLAP database administration,
            application management, and other tasks related to a farm.
    
        The Administration Service scales with:
- The number of users.
 - The frequency of tasks that require a lot of resources. User and roles management may require a lot of resources as the service scales with the number of users.
 
The number of instances is low.