RAM used by node itself

[andy77]

Hello @ all,

can enyone tell me how much RAM I should reserve for the node itself?
So let's say I have 64GB of RAM. How much of them can I assign to KVM Machines?

Is all the "Free RAM" in Dashboard shown, available for VMs?

Regards
Andreas

 

[manu]

A good rule of thumb is always to leave 1 GB for the host.
See http://pve.proxmox.com/pve-docs/chapter-qm.html#qm_memory for extra info.

 

[dcsapak]

hi,

1gb for the host is ok, but please note that if you use vms (not container) each vm needs a little additional memory which is not available in the guest (about 5-10%) so if you have a vm with 1GB, consider it using 1.05 - 1.1 GB

see also this recent discussion on the qemu-discuss mailing list:
http://lists.nongnu.org/archive/html/qemu-discuss/2016-11/msg00049.html