When you start SAS as a server that responds to multiple clients, you can use the DBSRVTP= system option to improve the performance of the clients. This option tells the SAS server whether to put a hold (block) on the originating client while making performance-critical calls to the database. By holding or blocking the originating client, the SAS/ACCESS server remains available for other clients; they do not need to wait for the originating client to complete its call to the database.