1. 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...
  2. 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...
  3. 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...
  4. 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...
  5. 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...
  6. 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...
  7. 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...
  8. 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...
  9. 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...
  10. bbgeek17

    [TUTORIAL] Proxmox VE vs VMware ESXi performance comparison

    Many discussions have compared Proxmox and VMware from a feature perspective, but almost none compare performance. We tested PVE 7.2 (kernel=5.15.53-1-pve) and VMware ESXi 7.0 (update 3c) with a 32 VM workload to see which performs better under load with storage-heavy applications. The results...
  11. aPollO

    VirtIO Block still first choice for disk performance?

    Hi Guys, is VirtIO Block (nicht VirtIO SCSI) still the best choice for performance? I'm talking about a 4 node cluster with around 200 guests on a ceph storage. Cheers,
  12. O

    Low disk subsystem performance

    I've got four HP DL360 G9 servers, which I intend to use in a hyper-converged cluster setup with CEPH. All of them are of the same hardware configuration: two sockets with Intel(R) Xeon(R) CPU E5-2699 v4 processors @ 2.20GHz (88 cores per server in total), 768GiB of registered DDR4 RAM...
  13. L

    How to fence off ceph monitor processes?

    I the continuous process of learning about running an pmx environment with ceph, I came across a note regarding ceph performance: "... if running in shared environments, fence off monitor processes." Can someone explain what is meant by this and how does one achieve this? thanks!
  14. D

    [SOLVED] Can Ryzen 7 3700U run smooth on Proxmox?

    Saw a mini PC with a Ryzen 7 3700U. I know that this processor is outdated, may this device consider small power consumption but big processing power? My main purpose is to install OpenWRT on the Proxmox as a Internet router. May simply learn docker, container and linux, use the virtual machine...
  15. S

    Poor performance over NFS

    Hello all, We have a following Proxmox setup: One storage server, HP DL380P G8, CPU Intel(R) Xeon(R) CPU E5-2630 0 @ 2.30GHz, 32GB RAM Storage Pool assembled on 8xSSD, Samsung SSD 870 QVO 1TB, which are put into the four mirrors with 2 drives each, and then mirrors are setup into the stripe...
  16. D

    Weird performance issues of two disks in Mirror mode - beginner question

    Machine is a reused gaming PC R5 1600 16GB 2133 RAM Gigabyte AB350 Gaming 3 Proxmox installed on a 120GB SATA SSD Disks in questions are two WD Red Plus 4TB (yes CMR variants, wd40efzx) running in Mirror mode. Drives are assigned to a Ubuntu server VM whose...
  17. O

    [SOLVED] High RAM consumption

    Hello, I'm not sure if this is normal. PVE is reporting almost 50% RAM usage (out of 56 GiB) while all I have running are 2 lxc containers which combined have under 1 GB of RAM allocated. I do have a Windows 10 VM set up but it is stopped and its RAM is from 8 to 24 GB. When I use top to see...
  18. N

    Backups from iSCSI backed LVM very slow

    Hello, I've found a few threads about similiar problem but none of them have a solution. We have a 3 node cluster with multipathed iSCSI storage using IBM Storwize SAN. In Proxmox 6.4 which we use, there is a shared LVM created which stores VMs on all nodes. We didn't notice any performance...
  19. S

    Disk IOPS and Throughput Limit Best Practices

    Hello all, We're looking for Best Practices regarding setting IOPS and Throughput limits on "Hard Disks" in proxmox. There's obviously limit and brust settings under Advanced on a given disk. Questions we have: Is there a way to see, from the Host level, the current IOPS/Throughput a...
  20. S

    NVMe performance inside the guest OS

    Hello. I assembled mdadm raid0 from two Samsung 970 Evo plus NVMe SSDs, created an LVM VG on it and gave the thick LV as a virtual machine disk based on Centos8. On a hypervisor, this RAID delivers about 7GB/s read performance. When I test inside the guest OS with: fio --readonly --name=onessd...


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