Solution : https://service.sap.com/sap/support/notes/1148480 (SAP Service marketplace login required)
Key words : 
latest cum tape latest db-fixpack latest hiper-fixpack latest pase ptfs si32551, profile parameter as4/dbmon/enable = 0, cpf5027 messages indicating deadlock situations, 6d dw patch level listed, resulting record variable length data, running sap netweaver java stacks, respective sap netweaver application servers, latest db-fixpack, sqe plan cache dump, double-byte character data
Related Notes : 
       
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| 1548414 | IBM i: OutOfMemory error due to JDBC driver | 
| 1526047 | KEDV: SQL error 420 when creating a summarization level | 
| 1489021 | SAP NetWeaver 7.0 including EHP3:IBM DB2 for i | 
| 1430134 | SAP NetWeaver 7.0 EHP2/Business Suite 7 - IBM i | 
| 1277450 | IBM i: Importing 46D patches into i5/OS Version 6.1 | 
| 1264859 | IBM i: Deterioration in performance after upgrade | 
| 1234445 | SAP NetWeaver 7.0 EHP1/Business Suite 7 - IBM i | 
| 1167276 | IBM i: APYR3FIX terminates on i 6.1 for subcommand EPSV | 
| 1161275 | IBM i: Switch Web AS Java from Classic VM to IT4J | 
| 1138824 | IBM i: Installation of usage type DI fails with SQL-356 | 
| 1134777 | SAP NetWeaver 7.0 SR3 Installation: IBM DB2 for i5/OS | 
| 1134188 | DB4: SQL error for statements with CLIENT as field name | 
| 1125071 | iSeries: Incorrect release in AS4RMTCCMS and DBSLDB4RMT | 
| 1123950 | iSeries: AS4FIXFILE terminates with CPF700B (V6R1) | 
| 1117101 | iSeries: Object conversion when loading or applying patches | 
| 1083218 | iSeries: Analysis of plan cache for DB2 on i5/OS | 
| 977906 | 6.20/6.40 Patch Collection Inst. on IBM eServer iSeries | 
| 175852 | iSeries: Authorization problems in SAPOSCOL and CRTR3SYS | 
| 68440 | AS/400: How do I upgrade to a higher OS/400 Release? |