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. H

    IO Delay, configured wrong?

    Hi folks I've had Proxmox up and running a few months now. Overall, it's been great. My one issue is whenever a VM has disk activity, the overall IO delay sky rockets. Goes to maybe 70-90%. This pretty much halts the entire installation, including other VMs and LXC's. But for the life of me I...
  3. M

    VM Performance Issue While Clone and Restore

    we are facing an issue and are not sure how to troubleshoot or find the exact reason behind it while we attempted to clone any VM or try to restore a backup from PBS we noticed the other VMs would get affected and not function properly like hanging for sometime already i tried to make the VM...
  4. P

    High load with very simple disk operations on single VM

    Hello, for a long time (personal home lab, machine from 2016, I don't know how long the problem exist, I just ignored it until now), I have the problem, that one single VM on my system is able to let the load explode to >40 and let other VMs crash. Just with disk operations. I used fio to test...
  5. P

    SSD setup for VM host

    Dear, Currently we have some troubles with High IO delay on almost any 'heavy' write on the VM. Our Proxmox is currently installed on Crucial MX500 with ZFS RAID 1. I was searching on the web and I saw that this could happen because of these disks can't handle much IOPS for VM Hosting. I was...
  6. C

    VM IO drops to near 0

    Hi, On a few of our VMs we see the following behaviour when a backup runs. The backup started at 05:00:02 From the outside the VM seems fine (proxmox summary page), but when the backup started the OS changed the disk into read-only mode Oct 25 05:00:57 *******-SQL-02 kernel: [5294216.466540]...
  7. S

    IO-Delay identifizieren

    ich habe mich nach meinem letzten Beitrag hier nun dazu entschieden zum rumspielen erstmal einfach so einen neuen Host aufzusetzen. Allerdings ist mir aufgefallen, dass das neue System permanent einen I/O-Delay anzeigt, selbst wenn gar keine VMs laufen. Wenn ich jetzt zB eine Windows VM laufen...
  8. D

    High I/O delay during backups on ZFS

    Hi, I am encountering some problems making backups on many servers running ZFS. The PVE cluster is made of 4 nodes, every node have a ZFS mirror pool on 2 NVMe SSD drives and a full backup is made once per week at 00:30 on different days per each node: Every time a backup is started I see...
  9. T

    Measuring Co-Stop (vSMP) Usage in Proxmox

    Hey Everyone, Back from ESXi-land with another valuable question, well two in fact. The question in the title is about measuring CPU resource usage in more detail, for example in Proxmox I love that there is an oi-delay counter. Questions: How would one go about measuring something like...


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