i/o delay

  1. X

    IO Delay

    I have always had the problem with repeatedly occurring IO delay increases up to 60% and more during heavy hard disk activity. One of my LXCs is an SMB server and when I move large data back and forth over a long period of time, the problem usually occurs. My specs are as follows: 12 x AMD...
  2. E

    [SOLVED] Windows VM I/O problems only with ZFS

    Hi, I'm a new Proxmox user. I've built a small lab to evaluate PVE and PBS, with the intention of replace out Hyper-V infrastructure (90 VMs in 3 sites, many in replica). We got two Dell R640 servers for PVE and another for PBS. For this testing purpose we are using 4x WD Blue 1TB SSDs (model...
  3. D

    I/O wait everyday at 06:12

    Hi, I have a 7.2-5 host that every morning at 6:12 has a very high I/O wait. Is there something that PVE does at that precise hour? Like a a cron or something? Thanks
  4. J

    High I/O delay

    Hi, I'm facing high a strangely high I/O delay. I have 3 times A Dell Poweredge 720XD with (almost) the same configuration. The main specs are that are the same over all three servers are: - 26x 500gb SSDs in a ZFS pool (RaidZ3) ashift 12 with a block size of 256K - 380GB of ram - Dell Perc...
  5. S

    I/O delay with SSDs

    Yesterday such a story happened. There are I/O latencies. Didn't install anything. Drives Samsung SSD EVO Plus 250 Gb, SSD 870 QVO 4Tb, RAM 32 Gb, 4*Intel Core i5-6500. S.M.A.R.T SSDs are good. What is the reason and how to fix it. This may have happened after a Proxmox update.
  6. S

    Windows VM : poor disk latency

    Hi ! Using diskspd (https://github.com/microsoft/diskspd) from Microsoft, we have benchmark disk speed on a Windows Server 2022 VM, hosted on a proxmox host - of course -, alone. [...] Total IO thread | bytes | I/Os | MiB/s | I/O per s | AvgLat | LatStdDev | file...
  7. J

    Zpool Gets Suspended and All Disks Become Unavailable

    Proxmox VE Version: 7.1-12 Server 1 Hardware: Intel i5 quad core 3rd gen, dual 120gb ssd in zfs raid1 boot and root disks 3, 2tb hdd in raidz1, 2 seagates and one HGST 4, 1tb hdd in raidz1, Inside a four disk ProBox usb3 enclosure Server 2 Hardware intel i5 dual core 3rd gen laptop cpu...
  8. A

    Poor disk performance on Linux VM

    Hi, After reading many threads, I decided to open one to try to solve a performance problem that only affects Linux VMs. I have a Proxmox VE 6.5-5 installed on Dell R720 with 2 Xeon E5-2660 v2 2.20GHz, 128 GB RAM and RAID controller PERC H710 Mini (integrated). RAID1 volume for the system and...
  9. A

    Pretty bad performance, not blaming PVE but my configuration...

    Hi there, Disclaimer: I have never had any interaction with a server virtualization management platform and I just wanted a cool software I could use to run multiple VMs, I know nothing about what a ZFS or LVM drive is, I/O delay... etc. I just have experience working with host OS like Ubuntu...
  10. B

    [SOLVED] Very poor IO Delay / FSYNCS/SECOND on RAID1 Sata disk

    Hello, We migrate old three server on proxmox 5.2 to three new server EG-32 on OVH (Serveur EG-32 - Xeon E3-1270v6 - 32GB - SoftRaid 2x4To) with proxmox 6.2. In december, we migrate all VM on new servers, since, we face on low FSYNCS/SECOND and high IO delay, we don't have any issue on old...
  11. Z

    Very slow SERVER and VMs

    Hello dear community. Server features: https://prnt.sc/s3hnb0 (+ a single 2TB HDD hard drive) Configuration of a default VM: https://prnt.sc/s3hq8c Black screen: https://i.imgur.com/MJUMOrD.png I have started having serious problems on my server since I start having quite a few VMs. I have...
  12. E

    [ZFS] SSD High I/O (Standalone Installation)

    Hi, I have a Proxmox standalone installation and have high I/O when working in any instance running in raid ssd. proxmox-ve: 6.1-2 (running kernel: 5.0.21-1-pve) pve-manager: 6.1-3 (running version: 6.1-3/37248ce6) pve-kernel-5.3: 6.0-12 pve-kernel-helper: 6.0-12 pve-kernel-5.0: 6.0-11...
  13. V

    zfs and I/O delay measurements in proxmox 4.1.33

    Hi, Little introduction: I had a big problem of heaving big I/O delay and error in file contents inside VM's on my ovh(provider) server a few months ago after an error of consistency from my mdadm raid. So I had to completely restore all my VM's to have my setup back running. Since this event...


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