SAP Buffers and Synchronization In a distributed architecture, the database and instances can be on separate servers. Therefore the access to database from the application instances would have to resort to inter server communication over the network. If the data is not changed very frequently and not too big, caching it at the application's memory can improve the access speed. Apart from improving the access speed, caching will prevent the load on the database. By reducing the database load, the need to add more CPU (and memory) can be avoided, which in turn reduces the licensing cost. SAP buffers are a part of the application memory that conceive this concept. Buffer Synchronization SAP buffers are local to each instance. When a change is made, the application instance where the transaction ran can be made aware of the change easily. However, it is very important to ensure that the changes are communicated to other application instances to ensure validity of the buffered in