Enhanced Data Server Interface (DSI) efficiency improves performance by reducing data replication latency, which decreases the length of time that Replication Server waits for results from the replicate data server through the ct_results routine, and subsequently reduces the length of time the data server waits for Replication Server.
See “Enhanced DSI efficiency” in Chapter 4, “Performance Tuning” in the Replication Server Administration Guide Volume 2 for configuration information.