Solution : https://service.sap.com/sap/support/notes/513454 (SAP Service marketplace login required)
Key words : 
shared master data tool, longer required change pointers, note 0305462 'migration change pointer, generally deactivate change pointers, longer required reorganized, ale-smd tool, sap release 45b, unrequired change pointers, write change pointers, activate change pointers
Related Notes : 
       
| 1376267 | MAM: Deactivating change pointer MEREP_DELTABO at BD50 | 
| 706836 | ALE: Intensive SQL accesses when reading change pointers | 
| 706478 | Preventing Basis tables from increasing considerably | 
| 626628 | ALE: No release of temporary segments | 
| 444124 | Expensive SQL statement on table BDCPS |