Memory Management - what is going on?

[chrisanzalone007]

So... I have 5 VM's currently running with RAM allocated:
2GB for ubuntu
8GB for windows2012R2
2GB for ubuntu
1GB for ubuntu
1GB for ubuntu

14GB total RAM should be used on the host. Minimum. Plus whatever the host OS uses.
Looking at the summary tab (or via "free -m" in SSH/shell) is showing 10.58GB being used.

Memory ballooning is disabled on every VM (info balloon confirms this via "monitor" tab). KSM sharing shows 0%.

What is going on?

I had an issue last night where my windows VM was downloading a torrent, and it killed performance ( I was streaming a video off of this server from a client PC while the torrent was downloading and it halted the video I was watching - once the torrent finished - performance was fine) - I never had this problem with KVM (Or HyperV) so I'm starting to troubleshoot and noticed this first. (windows VM is using a WD RED HDD via a usb3 disk - setup with LVM - cache=none --- read/write @ sequential is about 140MBs/140MB/s and 0.5MB/s/1.5MB/s @ 4k) thinking possible usb3 driver issues next (or possibly failing HDD?)

Fairly new with linux (and proxmox!) and trying to learn the tools to help me through troubleshooting. Any help is appreciated!

Thanks!

 

[Rhinox]

14GB total RAM should be used on the host. Minimum. Plus whatever the host OS uses.
Looking at the summary tab (or via "free -m" in SSH/shell) is showing 10.58GB being used.

I'd like to have your problem (host using less memory than you think it should)! Mine is mostly opposite: even taking arc into account, pve-host is using more than (I think) it should. And I can not even find why (ps, top, etc shows nothing)...