Enfin j'ai réussi à démarrer l'OMS sur ma VM avec au moins 6Go de RAM !
J'en ai chié !!! Mais j'y suis arrivé ...
[oracle@joguess ~]$ free -m
total used free shared buff/cache available
Mem: 5443 1596 1511 398 2336 3195
Swap: 2047 0 2047
[oracle@joguess ~]$ emctl start oms
Oracle Enterprise Manager Cloud Control 13c Release 1
Copyright (c) 1996, 2015 Oracle Corporation. All rights reserved.
Starting Oracle Management Server...
WebTier Successfully Started
Oracle Management Server Successfully Started
Oracle Management Server is Up
JVMD Engine is Up
[oracle@joguess ~]$ free -m
total used free shared buff/cache available
Mem: 5443 3650 240 394 1552 1124
Swap: 2047 4 2043