Performance Problem Proxmox 5.2 with RAIDZ-1 10TB


Active Member
Nov 22, 2014

I've been looking for the reason for the slowness of my Proxmox server but I have not been able to detect the problem.

I have an HP DL160 server with 2 Intel Xeon processors, 32GB RAM DDR4 and 4 4TB hard drives in RAIDZ-1 ZFS (10TB Storagen in local-zfs)

I have installed 3 VMs: 1 Ubuntu (File Server), 1 Win 7 Pro, 1 WS2012 Std. My problem happens when any VM performs file transfer (Ex.: 5GB ) in network. The Processors exceed their capacity and all processes are very slow:


I have done several tests with the VMs but in all cases when data is being copied to the local-zfs, in several cases the network goes down

This is a image of Proxmox without performing data transfer:

Package version:
proxmox-ve: 5.2-2 (running kernel: 4.15.17-1-pve) pve-manager: 5.2-1 (running version: 5.2-1/0fcd7879) pve-kernel-4.15: 5.2-1 pve-kernel-4.15.17-1-pve: 4.15.17-9 corosync: 2.4.2-pve5 criu: 2.11.1-1~bpo90 glusterfs-client: 3.8.8-1 ksm-control-daemon: 1.2-2 libjs-extjs: 6.0.1-2 libpve-access-control: 5.0-8 libpve-apiclient-perl: 2.0-4 libpve-common-perl: 5.0-31 libpve-guest-common-perl: 2.0-16 libpve-http-server-perl: 2.0-8 libpve-storage-perl: 5.0-23 libqb0: 1.0.1-1 lvm2: 2.02.168-pve6 lxc-pve: 3.0.0-3 lxcfs: 3.0.0-1 novnc-pve: 0.6-4 proxmox-widget-toolkit: 1.0-18 pve-cluster: 5.0-27 pve-container: 2.0-23 pve-docs: 5.2-3 pve-firewall: 3.0-8 pve-firmware: 2.0-4 pve-ha-manager: 2.0-5 pve-i18n: 1.0-5 pve-libspice-server1: 0.12.8-3 pve-qemu-kvm: 2.11.1-5 pve-xtermjs: 1.0-5 qemu-server: 5.0-26 smartmontools: 6.5+svn4324-1 spiceterm: 3.0-5 vncterm: 1.5-3 zfsutils-linux: 0.7.8-pve1~bpo9


Any ideas to detect and solve my problem?

Thanks very much!


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Thanks for your answer!

I do not have ballooning in the VM enabled ...


As a test there is only 1 VM on and try to transfer 1 file of 4.5GB but again Proxmox and the network fell ...



I appreciate any help to solve my problem!


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