Install of Server 2025 using high amount of resources

You can see the host RAM usage at this pics.
I'll change the PVE language to English next time...
 
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as for cpu performance issues, there ist a similar thread, basically switching the cpu from host to x86-64-v2-AES solves that.
you may want to check if this affects you as well

but as already stated, if you assign 2 vCores = 1 physical Core then the performance of your Windows Server 2025 VM will be bad
 
I had a similar issue with server 2025 where balloon service is not installed by guest agents for some reason automatically.
I discovered this because on proxmox on the vm under monitor if I typed "info balloon" it gave only basic info. I checked and the service was missing on the server.
I could install it from the iso manually with "blnsvr.exe -i" and it started right up and fixed ballooning right away. All normal now. (make sure you copy the files to the c: before installing service).

-P
 
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