i’m always getting warnings/critical messages for all sorts of VMs and don’t understand the purpose - if i configure a VM with 8GB memory, isn’t it meant to use all of that 8GB of configured memory then ? on linux all of the memory is getting used - for processes, buffers and caches. and for kernel data structures.
so - what is this telling to me and how to adjust properly ?
I consider disabling this service entirely because i’m getting spammed.
My experience is that it’s only a matter of time until any Linux VM has this check go critical due to using as much free RAM as possible for caching, so I consider this check useless at least for Linux VMs. Also see PVE incorrectly displays RAM consumption by Linux virtual machines | Proxmox Support Forum (TLDR: it’s showing what the QEMU guest agent reports).
Keep in mind this is not meant as memory consumption of the VM but memory consumption on the host system of this VM.
I know why it was in my example different - this was not a VM it was an LXC.
i still don’t get the point - why is it a problem and a warning being triggered by default, when a VM is configured to use 2gb of memory when it actually is using that 2gb of memory ?
If it is a problem or not you need to decide. For the memory check it has a default parameter value as many checks have. If this is a good or bad default value needs to be decided. In my case it is easy - if i monitor the VM/LXC with normal agents i will set this value for the “Proxmox VE Memory Usage” to 101% and that’s it.
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