[PVE-User] KVM processes eating up CPU usage after a while.

Ralf Storm ralf.storm at konzept-is.de
Thu Mar 14 13:35:27 CET 2019


Hi,

I have a similar issu in a 5-node cluster, upgraded a few weeks ago from 
the no-subscription repo:

When i migrate a bunch of vms to another server, some of them reach 
90-100% cpu after a while and are not responding until I do a "reset", 
then it works again

Mit freundlichen Grüßen / With best regards


Ralf Storm
IT Administrator

Konzept Informationssysteme GmbH

Am 14.03.2019 um 13:21 schrieb iTeV:
> Hi folks!
>
> I am currently experiencing a weird "issue" with my KVM processes on
> ProxMox after I upgraded the packages last saturday night (That sure as
> hell was a loooong night :-))
>
> When running a VM, the KVM process tends to use more CPU usage after a
> while. For example: I boot up a VM within proxmox. The CPU usage is
> "normal" (`top` showing 5-10% cpu usage for the KVM process) for the
> first 3-4 hours. After that, the CPU usage keeps slowly increasing, while
> the VM is just idling. This gets to the point that the KVM proces is doing
> 80-90% CPU, and the VM is still idling.
>
> My CPU (understandably) does not like this, resulting into reaching
> higher temps then usual.
>
> Is anyone experiencing the same behaviour and/or does someone know how
> to properly troubleshoot this?
>
> With kind regards,
>
> iTeV
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