In SAP Replication Server releases prior to 16.0 SP03 PL04, the replication involving multiple databases was resource intensive and complex. With automatic memory management enhanced in 16.0 SP03 PL04, SAP Replication Server supports you to replicate multiple databases (certificated with 20) in parallel with the simpler configuration steps and lower total cost of ownership (TCO). Thus, with this feature enabled, SAP Replication Server performs much better when you manage multiple pairs of databases in the HADR and non-HADR environments.