Solution : https://service.sap.com/sap/support/notes/76862 (SAP Service marketplace login required)
Key words : 
prerequisites solution os      version          shm minimum  informix version-------  ---------------  -----------  ------------------------- hp-ux     9, fc3 64bit data base                         hardware solaris   2, 20 enlarge shared memory address space, 20 lvm commands cumulative patch                         --> replaced, developers tools             cumulative                        --> replaced, process program disp+work, 64bit database version 7, additional key words, ev3p6 ======================================================================== additional patches, 75gb shared memory
Related Notes : 
       
| 146528 | Configuration of R/3 on hosts with much RAM | 
| 111876 | Installation of a 64 bit Informix Dynamic server |