Solution : https://service.sap.com/sap/support/notes/600141 (SAP Service marketplace login required)
Key words :
Rollback SegmentPSAPROLL, PSAPUNDOAutomatic Undo Management, Manual Undo Management, AUMORA-01555: snapshot too oldDBA_ROLLBACK_SEGS, V$UNDOSTAT, V$ROLLSTAT, V$ROLLNAMESystem Managed Undo (SMU)
Related Notes :
| 1475173 | Contention with auto-tuned undo retention |
| 1035137 | Oracle Database 10g: Automatic Undo Retention |
| 937492 | FAQ: Oracle Flashback |
| 830576 | Parameter recommendations for Oracle 10g |
| 706625 | Oracle9i: Locally managed SYSTEM tablespace |
| 598678 | Oracle 9i: New functions |
| 534036 | SAP LT: System settings for conversions |
| 185822 | ora-1555 - cause and action |
| 3807 | Error messages regarding rollback and undo segments |