Solution : https://service.sap.com/sap/support/notes/579675 (SAP Service marketplace login required)
Key words : 
system parameter rsdb/obj/buffersize, parameter rsdb/obj/buffersize, 0b            import support package 09, 1c            import support package 03, export data cluster, settings -> memory display, 0b support package 09, 1c support package 03, bw support packages, support package 09/03
Related Notes : 
       
| 571720 | SAPBWNews BW 3.1 Content Support Package 09 | 
| 520684 | Runtime error "EXPORT_BUFFER_NO_MEMORY" |