Solution : https://service.sap.com/sap/support/notes/1392526 (SAP Service marketplace login required)
Summary : 
      The SAP Note discusses updates pertinent to the SAP NetWeaver Business Warehouse (BW) Accelerator which enhances query performance significantly via in-memory data compression and data partitioning. The BW Accelerator integrates with SAP BusinessObjects Explorer and Data Services, facilitating rapid and complex data analysis for end-users. This combination serves predictable high-query volumes effectively with minimal administration. For update instructions, refer to SAP's service portal, and for BWA 7.20 license key requirements post Revision 6, see SAP note 1445787.
Key words : 
boosting sap netweaver bw performance based, accelerated version enables quick access, sap netweaver bw customers adopting, support rapid decision-making, sap netweaver bw accelerator, sap businessobjects data services, businessobjects data services reason, sap netweaver business warehouse, solution sap businessobjects explorer, sap businessobjects explorer
Related Notes : 
       
| 1608979 | BWA 7.20/7.00: Initial reorg fails after adding backup blade | 
| 1605932 | BWA 7.20: Revision 13 | 
| 1594611 | BWA 7.20: Revision 12 | 
| 1582973 | BWA 7.20: Revision 11 | 
| 1578086 | Corrected BWA update procedure of Enterprise Search 7.2 SPS3 | 
| 1537173 | BWA 7.20: Revision 8 | 
| 1524186 | BWA 7.20: Revision 7 | 
| 1499880 | BWA 7.20: Revision 6 | 
| 1484446 | BWA 7.20: Services may not start during update to Revision 5 | 
| 1464263 | BWA 7.20: Revision 5 | 
| 1452484 | BWA 7.20 Revision 4 | 
| 1445787 | BWA 7.20 License Key Installation | 
| 1427702 | BWA 7.20 Revision 3 | 
| 1414603 | BWA 7.20 Revision 2 | 
| 1393505 | BWA 7.20: Central Note | 
| 1380736 | Central Note: SAP BO Explorer, accelerated version |