VM internet speed slow down

[Maher Khalil]

Hello All
We found internet speed of all machines go down, we start to investigate infrastructure ...etc and found everything is ok.
we checked server and found everything is ok but noticed the below
when we checked htop command on the server, we found some machines load exceeds 100%. so we expected that server is loaded specially we use virtio driver for network but when we checked same machine load using proxmox GUI, we found maximum individual machines usage of host CPU arround 2.6% which tell us server is not loaded (photos are attached).
can you advice on this matter?
another issue is that the server has 1 socket (54 CPUs). we tried to lower / control load of the highest machine CPU loaded in top command result. the machine has 1 socket, 10 cores type host 10 vCPU and NUMA is enabled (see attached photo). so we wanted to lower the load. so we set CPU limit to 4 and disable NUMA but we found these changes does not affect CPU usage from top command in server shell
can you advice how to lower the load?

 

[gurubert]

The top command shows CPU usage in percent where 100% is one CPU thread.
Your VM has 10 vCPUs and uses ~15% of that. That is 1.5 CPU threads or 150%.

In total your Proxmox host has 54 CPU threads, 1.5 of them computes to ~2.7%.

 

[Maher Khalil]

got it
Thank you