[ovirt-users] Memory for Engine Machine

Hello folks I have a Engine dedicated machine running with 4GB of memory. It has been working fine without any apparent issues. If I check the system memory usage it rarely goes over 1.5GB. But when I upgrade oVirt Engine it complains with the following message: "[WARNING] Less than 16384MB of memory is available". Why is all that required if the real usage doesn't show that need ? Or am I missing anything ? Fernando Frediani