There have been a lot of posts lately about low memory situations where people are running the bare minimum of RAM.
I have from personal experience ran QubesOS on the lowest possible RAM and found that setting
dom0_mem=max:4096M
to
dom0_mem=max:1536M
in grub.cfg, will result in being able to open more Qubes on a low memory system.
If qmemman is running, what are the requirements behind assigning a default of 4Gb max RAM to Dom0 in the installation process, when this could represent 66% of the installed RAM on a system with the bare minimum 6GB per system requirements?
It was, I seem to remember, an arbitrary decision. There used to be
no limit.
It’s good practice to allocate to dom0, and also good practice to review
your requirements, and adjust accordingly. 4GB is a good starting point
for most systems.
duplicate folder /boot/efi/EFI/qubes into one named qubes2 cp -avr -- /boot/efi/EFI/qubes /boot/efi/EFI/qubes2
edit file xen.cfg in qubes2 folder to adapt options parameter dom0_mem=max:8192M and save
identify your boot partition disk with df /boot/efi or lsblk command
check the actual boot configuration with efibootmgr -v
add new boot and makes it first priority with command below to adapt to your hdd partition (-d and -p) and .efi correct path (-l) and desired name (-L) efibootmgr -v -c -u -L Qubes2 -l /EFI/qubes2/xen.efi -d /dev/sda -p 1
reboot and check BIOS to make sure you boot on the correct one
It did boot correctly but when arriving at login it seems my usb doesn’t respond nor for mouse or keyboard or yubikey, at luks it did works tho.
How can I update xen configuration to apply RAM value of 8192M ?
Am I really the only one here who cares to have more RAM, or is the EFI thing that is not common ?
Why does standard Qubes OS installation doesn’t pick the max to fit the max available RAM ?
I know quite a lot of users who would have switch to qubesOS but the lack of RAM stopped them to do so, well if the standard install doesn’t even pick your hardware to fit it is surely a miss here…
Hi, everyone, I also have a question on this topic. Memory usage for each Qube is always maxed out at 4000MB, although I think some may need more and I have 32GB of RAM. When I watch videos in a Qube or have many browser tabs open, the video stutters and the websites sometimes crash. Can I increase the memory for the Qube or set it to increase automatically?
The maximum of 4000 MB can be changed in the qube settings. If you switch on the tick below, the memory management will adjust RAM on the fly up to this value. Depending on your resources bottleneck, increasing the max memory might help with the video shutter.
OK thanks! If I increase the RAM capacity, the Qube always uses exactly as much memory as the maximum indicates, is the RAM then also in use or is it only theoretically available? And I have another question, which doesn’t fit the topic of RAM, but maybe it’s still possible, what are the pre-installed Qubes for, such as Personal, Work and so on, because I can’t install any additional software in the AppVMs anyway?
xl list in dom0 terminal and Open Qube Manager in panel are showing the default 4000+ RAM/memory after reboot with new grub.cfg. No error messages during generating grub config file. found theme, found linux image, found initrd image.
