slow

  1. D

    Very slow write speed and constant high I/O pressure on Proxmox

    Hey, if I try to create a LXC Container on my Proxmox, it takes up to 5 minutes. The issue doesn't appear when I install a VM. While a container is creating, the disk usage for that disk is at 100% (checked with iostat -x 1) I also tried to write with "dd": root@pve1:~# dd if=/dev/zero...
  2. C

    Lenovo SR650 V3 Proxmox Storage slow storage

    I have 4 Lenovo SR650 V3 , with 25Gb networking In active / passive each of the servers have 10 NVME i believe 3tb each, 4 nodes are in a cluster, ive used CEPH storage and ZFSPOOL RAIDZ2 either local or Linbit linstor, doing FIO test getting anywhere from 30 MBs to 500Mbs on the best day...
  3. S

    [SOLVED] One Debian Guest VM extremely slow on Proxmox VE 9 - all other seem fine on the same Host

    I am having a Problem with one Debian Guest VM (running Debian 12 Bookworm AMD64, currently running the Upgrade to Debian 13 Trixie AMD64). It's extremely sluggish, even to just run apt update. While compiling Kernel Modules (e.g. zfs via dkms) I can see that the CPU Usage never gets above 15%...
  4. O

    zfs send over 10Gbe horribly slow

    I am trying to use zfs send to duplicate and entire pool between 2 nodes and I am getting very slow results. Any help would be appreciated. Hardware (both nodes identical): HPZ840, Dual Xeon 36 core, 256GB ram Asus M4 with 4x 2TB WD SSN7100 in RaidZ NIC Intel X550T2 10Gbe Testing pool speeds...
  5. A

    Slow garbage collection and failed backups

    Hey everyone, We're experiencing issues with garbage collection being slow. In some cases, this is causing backups to fail and also resulting in backups taking longer than expected to complete. Our set up is not ideal as we're using network attached storage and not using SSD's, but it was...
  6. V

    Slow (or unexpected) NVme speed even with ext4

    Hi, it's me again. Dear forum friends, Today I'm here with a question that has me thinking and that I can't seem to make sense of. I have a server with very good hardware specifications. In fact, I posted about it a while ago to see if I should install ZFS in RAID 10 to host my VMs. These are...
  7. M

    Migration from ESXI to Proxmox (extremely slow)

    Thanks guys for adding that migration option. Works fine for some VMs. Tested multiple times with non-prod VMs, slow but acceptable. I've got around 600-700Mbps, it took 30 mins for 100GB VM migration. On the weekends I started prod VM migration (200GB disk size). I expected to get it complete...
  8. N

    Slow read/write values on NFS export

    I am testing before migrating from ESXi7.0 u3 to Proxmox VE8.3. Now I have noticed that the performance of the VM disk on Proxmox is half or even less fast. I have a NetApp with 800GB SSDs for storage. Everything is connected over 10G to a Cisco Nexus switch and the host hardware is the same, so...
  9. J

    VM's slow and Hight I/O Delay

    Hello everyone! I've recently started using Proxmox on a machine with the following specifications: Processor: Intel® Xeon® Processor E3-1220 v2 RAM: 8GB Storage: 1TB SATA HDD I'm only running one virtual machine at a time due to the hardware limitations. However, I'm experiencing some...
  10. D

    SATA issues

    Hello ! I've been struggeling with one of my servers for several months now. There seems to be a hardware conflict related to SATA. My ZFS RAIDZ (4x 10TB HDD in 2 mirrors) claimed that there was 1 disk failure. I replaced the disk and shortly after, 2 more disks seem to fail (one in each of the...
  11. 3

    Windows 10 Very Slow, but not Laggy on the UI via NoVNC or RDP

    Hello, I am experiencing a very slow Windows 10 VM on Proxmox 8.1. Proxmox 8.2 would NOT install on my Dell R610 dues to some undocumented bug. Dell R610, 24 cores, 96 GB RAM Proxmox 8.1 Click on task manger or file Windows Explorer, it pops up 10 seconds later, very unresponsive, but not...
  12. O

    Ubuntu VM slow SMB transfer speed to NAS

    I have a Ubuntu 24.04 VM setup in Proxmox VE 8.2.4 on its own SSD and for some reason, file transfers to my local Truenas Scale SMB share are stuck at 55-60MB/s. I ran a Iperf3 test to the NAS and it caps out at 110MB/s so it's not a limitation of the network. This VM has 6 Ryzen 4600g cores...
  13. V

    Backup issues with Windows VMs - 100% active time

    I'm having some trouble with backups on my Proxmox cluster and I'm hoping someone can help me troubleshoot. I've been searching for solutions online for a while now, but I haven't been able to find anything that helps. Here's my setup: 3-node Proxmox cluster Backups to both a NAS and a PBS...
  14. 1

    Strange and slow networking behaviors

    Alright context. I have 2 nodes in a cluster. Dell R620 Dell R720 Going to talk about 3 devices total. All have 10Gb networking to each other through a switch Both machines are running the same pve version (8.1.10) and kernel versions, both are fully up to date Both machines have the same...
  15. J

    slow vm migration

    Good afternoon dear, I have a problem with about 3 nodes of which all share a 10g fiber link for migration and vms backups. but even if the vms migration and restoration are slow some reason why so little speed 3 nodes config network nodes cluster config slow restoraution vm...
  16. G

    Remote Desktop Services slow after pve7to8 migration

    Hello, I just migrated pve7 to 8. Every VMs work well except two Remote Desktop Services VMs which are slow, especialy in Excel. I'd like to know if anybody had the same problem and if someone has some ideas on how to solve the problem. regards
  17. V

    Very slow performance in VMs

    Hello everyone! I'm no storage expert but I do observe some subpar disk performance on Windows (I have some linux I can test as well but I didn't notice anything while using them). We use ZFS and we disabled balloon and tablet following https://pve.proxmox.com/wiki/Performance_Tweaks Here is...
  18. K

    Intel i9 13900k bad multicore perfomance

    Hello there everybody, i am running an Windows 11 VM on my proxmox server (newest BIOS and all settings double checked on the BIOS side). I use a i9 13900k and 64 GB 3200 mhz DDR4 RAM. Somehow no matter what i am doing i get disappoting multicore benchmark results in the Windows 11 VM. I tried...
  19. J

    HP P440AR (HBA) and SAS Drives Extremely Slow

    This problem has been rumbling on a while, lots of trace messages about delays, ceph being "flakey", very slow VMs, kubernetes clusters taking 30 min to come up etc. We migrated one VM with Kubernetes onto a little bit of NVME local-storage and at the moment, the view its that is has come...
  20. W

    Poor VM performance in comparison to Unraid VM.

    I am wondering if anyone can help me debug, I have both UNRAID and prox running. Server has 2x e5-2699v4; 768gb ram. (HP dl380 Gen9) Unraid has ryzen 5 3600, 64gb ram I replicated the same setup I had on unraid as close as I could, but even after a lot of changes and iterations with my prox...