Logical servers let you to manage the use of multiplex resources most effectively. Use logical servers to assign different sets of multiplex servers to different applications to meet their individual performance requirements.
In a multiplex, each connection operates under a single logical server context. When you submit a query to a multiplex server, its execution may be distributed to one or more multiplex servers, depending upon the configuration of the connection's logical server. To dynamically adjust the resources assigned to a logical server, add or remove multiplex servers from the logical server to meet the changing needs of the applications that it serves.