Host CPU and Max vCPU on VM
I'm not sure if this is the correct place to post, but
I have a server running amd epyc 7402P with 48 threads (24 cores).
When I install xcp-ng, my host get 16 threads. Is this normal? or another question would be, is it necessary?(atm I'm running a clean install. no zfs etc)
And on my guests I cannot choose more than 32 vCPU's, is this somewhat related or just a xcp-ng limitation?
There is indeed a limitation described here concerning the maximum number of vCPU per VM :
You could be able to set more vCPUs via CLI
xeor XOA. What client interface are you using?
I heard some issues on a French Discord about a guy who tried to allocate more than 64 vCPU on a Windows VM and he had constants BSOD. So, 32 vCPU should be fine I guess.
FYI I used the XCP-NG Manager, did not try to add more vCPUs through
Have you tried XenOrchestra ? It removes some dumb limits (without further problems), and I guess you can set more than 32 vCPU without using CLI.
Don't have it yet, I'm just running alot of tests back to back. Will probably not need more than 32 vCPU but was just curious why I could only select 32. If it's only a xcp-ng manager problem, then it's all good
Yes, 32 vCPU is for very specific use cases. So, enjoy your experience
You can indeed set more than 32vCPU in Xen Orchestra