Solution : https://service.sap.com/sap/support/notes/181945 (SAP Service marketplace login required)
Key words : 
homepage business information warehouse->services & implementation->sap bw asap->bw asap, transaction spro --> sap reference img --> business information warehouse --> general bw settings --> aggregates, golden rules------------- adjust shared memory und pdq parameters, temporary dbspaces    informix pdq storage parameters     additional onconfig parameters 3, informix - onconfig parameters    logical und physical logs    size, hkey_local_machine->software->informix->online-> <servername> -> env, long transaction high water mark parameters, blocksize > nof rows basiscube / nof fragments, informix pdq storage parameters------------------------------- buffers, extras -> maintain   db storage parameters
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