Solution : https://service.sap.com/sap/support/notes/155197 (SAP Service marketplace login required)
Key words : 
reporting table rwcoom run extremely long, sap bw system takes extremely long, saplreom rwcoom gr55 ----- supportguide 20010208093844 -----reportwriter, -om-cca cost center accounting, -om-abc activity-based costing, -om-pro overhead cost projects, -om-opa internal orders, additional key words bw, -om overhead management, bw-bct-coom
Related Notes : 
       
| 161298 | BW extractors: Performance InfoSources projects | 
| 161235 | BW Extractor: Termination with incorrect request ID | 
| 160990 | BW Extractors: InfoSource does not deliver all data | 
| 156319 | Collective note performance BW 1.2B |