Solution : https://service.sap.com/sap/support/notes/913975 (SAP Service marketplace login required)
Key words : 
sapbwnews bw sp16 netweaver'04 stack 16, key components = 1 partprov 2 iobjnm 2, key components = 1 iobjnm 2 partprov 3, 0b            import support package 30, 10 content            import support package 24, key category = unique, provide advance information, 50            import support package 16, row type = rsd_s_mpro_iobj_ident, 0b support package 30
Related Notes : 
       
| 928151 | Memory consumption for MultiCubes with many part providers | 
| 914572 | Long runtime when you check or generate a query | 
| 911939 | Optimization hint for logical MultiProvider partitioning | 
| 907881 | MultiProvider with (too) many part providers | 
| 907246 | Implicit derivation of mapping rules in MultiProviders | 
| 905375 | Long runtime in the RSD_CUBE_GET function module | 
| 872275 | SAPBWNews BW Support Package 16 NW'04 Stack 16 RIN | 
| 872273 | SAPBWNews BW 3.1 Content Support Package 24 | 
| 872271 | SAPBWNews BW 3.0B Support Package 30 | 
| 825396 | Performance in reports with many selections |