[SOLVED] KVM VMs suddenly way higher CPU usage (not a problem of proxmox)

[Okumba]

Hello,

the problem of the sudden increase from ~ 0-3 % cpu usage to 12.5% per KVM VM was caused by another server in the dataserver. Our system got all its traffic which was then transfered to the VMs. We could observe around 4,000 to 10,000 connections with a bandwith of 1.5 - 3 MB/s. This was enough to increase the cpu usage of the VMs by 10-15%.
We are now back to normal since the datacenter fixed the problem.

 

[Okumba]

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[Okumba]

Solved, was not a problem of proxmox (for more information see updated first post). Moderators can delete this thread. Sorry for the inconvenience caused.