Memory overflow in buffer synchronization in SM21

1.    Get the number of the process and go to SM50

2.    Select the PID (Process ID)

3.    From the menu bar select Process>>Trace>>Display File

4.    In the developer trace, there should be a list of tables showing up that the buffers are complaining about. Examples below are possible...

B Thu Apr 17 06:19:54 2008
B ***LOG BS0=> escalation level 2 for buffer synchronization reached [dbsync#3
@ 3557] dbsync 3557
B Begin of notebook trace
B class = 7 table = /BI0/STCTSESUID
B class = 7 table = /BI0/STCTSTEPUID
B class = 7 table = /BI0/STCTSTEPUID
B class = 7 table = /BI0/STCTTIMSTMP
B class = 7 table = /BI0/STCTSTEPUID
B class = 7 table = /BI0/STCTTIMSTMP

5.    Look at the buffered tables and decide about which ones need to be changed from buffered to non-buffered. SE13 is the transaction to do that. The buffered tables need to be tables that have a large amount of reads, as compared to writes

OR

Contact SAP Basis guys to increase the tablespace.