Windows & Linux VDI VMs feels So laggy

H

Hydra

New Member
Sep 28, 2024
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Hi everyone, I'm struggling with a very laggy RDP experience on my Proxmox cloud server.

  • Host: 12 CPU, 128GB RAM, 1Gbps bandwidth.
  • Network: VMs on vmbr1 (10.10.10.0/24), using iptables on the PVE host for RDP port forwarding.
  • The Problem: RDP to both Windows and Linux VMs is slow and unresponsive (choppy mouse, delayed typing).
  • What I've tried: Virtio drivers and QEMU Guest Agent are installed and enabled on all VMs.
The connection works, but the performance is terrible. Has anyone solved a similar issue? I'm wondering if it's my iptables forwarding, the VM config (using default vga: std), or something else entirely.

Any tips would be great!
 
Please check which type of bus the hard disk is using in the hardware.
If it is set to IDE, even after installing VirtIO and QEMU Guest tools, the Disk I/O bandwidth itself will remain low.

If it is VirtIO or SATA, the issue could be related to the node or storage.
If another node is available, migrating the VM to a different node and testing there could also be a good approach.
 
Missing basic information: the underlying storage setup. Which drives are used? ZFS? Hardware RAID?
 
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