Solution : https://service.sap.com/sap/support/notes/582052 (SAP Service marketplace login required)
Key words : 
instance type               restriction- sap db oltp                  -- sap db olap               upgrade target version >= 7, [sap ag][sqlod32  dll][sap db] unable, valid sap db cd numbers, documentation -> database upgrades -> mysql maxdb, sap db/maxdb versions, sap db version lower, relevant cd material numbers, db version upgrade fails, temporary bw views immediately, database instance types
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| 788272 | Compatibility of Linux Kernel 2.6/NPTL with MaxDB | 
| 786635 | X-server hangs | 
| 785673 | MaxDB/liveCache upgrade to 7.4/7.5 w/ more than 64 DataVols | 
| 763972 | Loading of system tables fails with error -8022 | 
| 736009 | Error -3007 when you load system tables | 
| 669963 | Log mirroring: DUAL/Mirrored vs. Hard/software raid |