Solution : https://service.sap.com/sap/support/notes/165247 (SAP Service marketplace login required)
Key words : 
long-running batch jobs, additional key words psaproll, start setting initial 5 mb, oracle error ora-1555, additional rollback segments, rollback segments optimal, initial = 2 mb, default psaproll, set initial, optimal = 8 mb
Related Notes : 
       
| 124361 | Oracle parameterization (R/3 >= 4.x, Oracle 8.x/9.x) | 
| 103042 | Using the storage clause MAXEXTENTS UNLIMITED | 
| 60233 | Oracle rollback segments, more information. | 
| 3807 | Error messages regarding rollback and undo segments |