Release 10.1A: OpenEdge Application Server:
Developing AppServer Applications

Performance issues related to schema transmission

When there is a remote connection to a database from a Progress 4GL client, database schema information has to be constructed at the client. This involves network traffic to communicate the schema information from the database server to the client (even local schema caches require updates due to schema changes). For information on local schema caches, see the section on reducing connection times when connecting Progress 4GL clients to databases in OpenEdge Deployment: Managing 4GL Applications .

By using the AppServer agent as the only mechanism to access the database, a Progress 4GL client no longer needs to connect to the database. This eliminates network traffic, associated with the delivery of the schema information, to the remote client.