1. R

    performance of reconstitution of a raid5

    Hello, I did a raid5 then I changed a gradient so I wanted to know how I could see the reconstruction performance of my raid5
  2. S

    Proxmox 8.0 Tuning and best practices for production/colocated servers.

    Started reading every Wiki page and a bunch of forum posts.. but the "best practices" for a stable production server are a little vague. Does anybody have any recommendations for setting for sysctl? network? Kernel tweaks? or Do I need to pay somebody for this kind of detail? and support? Is...
  3. K

    decent hardware(enterprise), but vm windows still feels a bit slugish? - how to verify proper performance?

    Hi all, i'm all to new proxmox so bare with me with my very limited knowlegde. I have recently installed proxmox 8 on my server dell r730 cpu: 2x 2680v4 xeon (14 core/28 threads each) 320gb ecc ram root disk, 1 disk zfs - Intel D3-S4610 Series - model: SSDSC2KG480G8 ( purely for proxmox ) 1x...
  4. Y

    Performance Testing

    Greetings my friends. I wish you a good ending of the week. I have this particular question on my mind it's been a while now. On my laptop, I run a Python code that takes about 30 seconds to compile and run. My objective is to run the same code on a cluster of 3 nodes and determine how much...
  5. J

    Spotty Disk Performance with NFS Share

    Running a ProxmoxVE cluster with multiple Ubuntu VMs with the disks hosted on a TrueNAS NFS share. Occasionally one or more of the VMs will experience drastically reduced disk performance and I'm having a hard time pinpointing the cause. pve-manager/7.4-3/9002ab8a (running kernel...
  6. R

    proxmox NUMA static configuration support

    I am struggling to fully understand everything about NUMA, however I feel like I've got a decent understanding of how proxmox is handling it, as I've run many configuration tests over the last few days trying to solve my performance issues. I have a AMD EPYC 7551p (zen 1 architecture, 7001...
  7. T

    Direct USB passthrough is slow, but using SPICE is fast

    Hello, I want to pass a USB device to a VM (namely a USB TV tuner for a TV server). When I do it directly by adding a USB device to the VM with the vendor/device ID, it seems as if the device is sometimes slow to respond. However, when I add a SPICE USB channel, change the display to SPICE...
  8. U

    ESXi->Proxmox, 1G->10G Planning

    Hi, i want to migrate from ESXi (Essentials) to Proxmox and while there i'm thinking about switching to 10G for the main cluster. Reasons: - replication/migration for Proxmox goes faster (only needed for 2-4 VMs right now) - i use CARP for failover alot, so there are machines running on both...
  9. L

    Optimizing Guest CPU Performance

    Running a WIn10 guest with successful GPU passthrough, performance on that front seems decent. But I can't say the same for the CPU. Pretty disappointing, this is what the bare metal results for the host's CPU should be near for Single Thread score: CPU Test Suite Average Results for...
  10. N

    [SOLVED] Single connections to VMs limited to 10mbps, but multi-threaded iperf gets the full bandwidth

    pveversion: # pveversion --verbose proxmox-ve: 7.4-1 (running kernel: 5.15.107-1-pve) pve-manager: 7.4-3 (running version: 7.4-3/9002ab8a) pve-kernel-5.15: 7.4-2 pve-kernel-5.15.107-1-pve: 5.15.107-1 pve-kernel-5.15.104-1-pve: 5.15.104-2 ceph-fuse: 14.2.21-1 corosync: 3.1.7-pve1 criu...
  11. bbgeek17

    [TUTORIAL] Proxmox: iSCSI and NVMe/TCP shared storage comparison

    Hello Everyone. We received excellent feedback from the previous storage performance investigations, particularly the technotes on optimal disk configuration settings (i.e., aio native, io_uring, and iothreads) and the deep dive into optimizing guest storage latency. Several community members...
  12. A

    Webserver VMs with HTTPS loading incredibly slow

    I'm moving from Windows Hyper-V to Proxmox and was excited, but I'm noticing that the websites hosted by these VMs (running Ubuntu Jammy) are loading incredibly slow. So much so that often on the first page load, I get an error 522 from Cloudflare (the sites are proxied through them) and then if...
  13. B

    VM with physical disk attached. Much slower than physical machine...

    Hi, For a migration, I have created a VM as described in Than I have attached a physical SSD-disk and configured passtrough, according to qm set 114 -scsi2...
  14. bbgeek17

    [TUTORIAL] Low latency storage optimizations for Proxmox, KVM & QEMU

    Several customers have asked us how to get the best possible storage latency out of Proxmox and QEMU (without sacrificing consistency or durability). Typically, the goal is to maximize database performance and improve benchmark results when moving from VMware to Proxmox. In these cases...
  15. A

    RadosGW - S3 - Performance Expectations

    I have a relatively small nvme Ceph cluster running on a dedicated 10gb network. RBD and CephFS performance seems to be pretty good at around 500MB per second in various synthetic benchmarks. Performance uploading a 16gb test file to S3 (RadosGW) from a VM is terrible at only 25MB or so...
  16. N

    [SOLVED] slow performance caused by ZFS trimming

    This issue has been solved. This thread is for anybody having slow I/O performance and searching for keywords. The cause might be ZFS trimming the rpool. I’m running proxmox version 7.3-1 on a Supermicro A2SDi-8C+-HLN4F with HP SSD EX920 1TB for the rpool. My proxmox node was unresponsive. VMs...
  17. S

    How to make a best use of an SSD drive in VMs?

    On my proxmox machine I got two SSD drives natively connected to it. First disk is for proxmox OS, the other I want to use in VMs. Basically, I want to use half of this second SSD drive in one VM, and other half in another, preferably with auto-adjusting sizes (in case one VM needs more than a...
  18. CH.illig

    [SOLVED] Performance Optimierung / nicht die erwartete Leistung.

    Ich betreibe 2 Cluster, 1X tolles neues wo alles erwartungsgemäss funktioniert, aber einmal ein günstigeres Setup was in der VM aber eine meiner Meinung nach viel zu schlechte Performance abliefert. Einmal die eingesetzte Hardware und Config: Wir hatten das Synology NAS in Verdacht zur...
  19. G

    Second backup server best practices?

    Hi all, I'm currently running one PBS for my cluster, which stores data on an NFS share backed by an enterprise-grade QNAP storage. Everything went fine until about two weeks ago, when I noticed some scheduled backups were starting to file sometimes. Also, I see that when I browse VM backups...
  20. N

    Performance Ceph-Resources, best practice

    Hallo zusammen! Setup: 9 Nodes, 53 LXC, Ceph-Verbund aus HDDs mit SSDs als Cache, einige Maschinen haben ein lokales ZFS (SSDs) als Cache. Prinzipiell ist die Performance gut und wir können uns nicht beschweren. Leider sind aber Folgebackups recht langsam. Beispiel: LXC foo: 100 GB/400 files...


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