Solution : https://service.sap.com/sap/support/notes/97179 (SAP Service marketplace login required)
Key words : 
ubc-minpercent          = 3        vm-ubcseqstartpercent   = 3        ubc-borrowpercent       = 3        ubc-maxpercent          = 7        vm-swap-eager           = 0        swapdevice = /dev/vol/rootdg/swapvol, terms dev_disp shm pool cereate error swapon shmget virtual memory swap digital unix page file swapdefault pre-allocation, /usr/sap/<sid>/dvebmgs/work shows error messages, /usr/sap/<sid>/dvebmgs##/work/dev_dispmessage file, attach semaphore monitor buffer [semxxmo2 0310] error => shmget, st06 -> detail analysis menu -> hardware info, #mv /sbin/swapdefault /sbin/swapdefault, 1893] log gaf=> alert init failed [alxx, /dev/vol/rootdg/sswapvol, digital/compaq unix/osf-1/tru64 servers
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| 217505 | Tru64 kernel parameters for R/3 for Tru64 4.x | 
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| 146528 | Configuration of R/3 on hosts with much RAM | 
| 103747 | Performance: Parameter recommendations as of Release 4.0 | 
| 97497 | Memory Management Parameter (3.0/3.1) | 
| 30606 | Entries in /etc/sysconfigtab under Digital UNIX | 
| 27269 | Error message: TSV_TNEW_INDEX_NO_ROLL_MEMORY | 
| 21960 | Several instances/systems on one UNIX computer |