John enhances replication-based synchronization (RBS) by tuning synchronization properties.
- In the Server Configuration view, click the Replication tab. 
 
- Change the  RBS Synchronization Cache Size property to 80M and Thread Count property to 50M. 
 
- Click Save.. If there are no errors,  the changes are written to the configuration file.
 A confirmation message is displayed on top of the administration pane. If there is a red error box that indicates that the value is invalid.