Notes on synchronization and extraction
                     
                   
                
             
            
               
                  - Extracting large numbers of subscriptions, or synchronizing subscriptions to large, frequently-used tables, can slow down
                     database access for other users. You may want to extract such subscriptions when the database is not in heavy use. This happens
                     automatically if you use a SEND AT clause with a quiet time specified.
                  
- Synchronization applies to an entire subscription. There is currently no straightforward way of synchronizing a single table.