Solution : https://service.sap.com/sap/support/notes/525006 (SAP Service marketplace login required)
Key words : 
environment variableldr_cntrl = maxdata=0x80000000on, setenv_02 = ldr_cntrl = maxdata=0x10000000, ldr_cntrl=maxdata=0x80000000, solution provisional workaround, ldr_cntrl aix reason, special instance profile, remaining address space, default address layout, insufficient shared memory, shared memory created
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