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    VM’s Slow booting

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    • olivierlambertO Offline
      olivierlambert Vates 🪐 Co-Founder CEO
      last edited by

      Cloudinit is loading many things, so I wouldn't be surprised it makes the boot longer. Can we check with a default/basic Ubuntu server install and give the timing?

      I 1 Reply Last reply Reply Quote 0
      • I Offline
        imaginapix @olivierlambert
        last edited by

        @olivierlambert

        Installed a new 22.04.2 Server in default installation and removed cloud-init. Hitting enter in grub to login screen 6 sec. on the same host as noted above

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        • olivierlambertO Offline
          olivierlambert Vates 🪐 Co-Founder CEO
          last edited by

          Let see in the community around if they have a similar experience. My impression is 6 seconds is relatively fine.

          M gskgerG 2 Replies Last reply Reply Quote 0
          • M Offline
            manilx @olivierlambert
            last edited by

            @olivierlambert I have one Ubuntu server 22.04, fresh install and it has had this "slow" booting (black screen foir a few seconds) since the install. Doesn't bother me much. While all my Debian 12 boot instantly without this hang.

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            • I Offline
              imaginapix @manilx
              last edited by

              @manilx

              Could this be the grub menu and it's wait timer? I had it once that I did no saw grub but the system bootet fine. In the end grub was the black screen and depending on the wait interval it stayed black.

              This might be a thing with how the console handles image grabbing during boot

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              • M Offline
                manilx @imaginapix
                last edited by

                @imaginapix Don't know enough of this. I only use debian and know my way around.
                The ubuntu VM was just a test....

                Here is a video of the VM booting: https://www.dropbox.com/scl/fi/z7urjkcubq8vnjjbcs9nn/ScreenShot-2024-04-19-at-18.01.45.mov?rlkey=iufbqfqy7758pke3hsiv58zpt&dl=0

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                • B Offline
                  bassopt @manilx
                  last edited by

                  @manilx I can tell you this is extremely dois compare to proxmox for exemple. My Debian VMs with one CORe on a i5-12400 boot in half of that time.

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                  • Tristis OrisT Offline
                    Tristis Oris Top contributor
                    last edited by

                    Ubuntu 20-22 boot is slow by design. It may take 1-2min.
                    Debian or any rhel boot in 20sec.

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                    • gskgerG Offline
                      gskger Top contributor @olivierlambert
                      last edited by gskger

                      @olivierlambert Out of curiosity, I carried out a few tests this weekend. My tests are not really scientific and must be taken with a grain of salt. I started with the bare metal installs, followed by the VM installs on the hypervisors. The current server ISOs have been used for OS or hypervisor installs. All OS or hypervisor were updated, but otherwise no tweaking was done (e.g. remove snap from Ubuntu).

                      The tests were carried out manually by starting the (bare metal/virtualized) OS and taking the time until the login prompt appeared. Where necessary, the grub menu was confirmed manually as quickly as possible. Up to three runs were averaged. The host is a HP ProDesk 400 G6 with a i5-10500T CPU, 32GB RAM and a KIOXIA 512GB M.2 NVMe SSD (KXG70ZNV512G). VMs had 2 CPU, 4 GB RAM and 32 GB storage.

                      Host OS Time to login [BIOS/EUFI in s]
                      bare metal Ubuntu 22.04.4 -/39
                      Debian 12.5 -/20
                      XCP-ng 8.2.1 Ubuntu 22.04.4 28/12
                      Debian 12.5 18/8
                      Proxmox 8.1.4 Ubuntu 22.04.4 12/15
                      Debian 12.5 10/10

                      Even if the differences are measurable, they don't have much significance for me in normal everyday operation. The result is still interesting though.

                      Edit: Added Time to login for EUFI boot on the hypervisors.

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                      • olivierlambertO Offline
                        olivierlambert Vates 🪐 Co-Founder CEO
                        last edited by

                        Thanks @gskger 🙂 Have you tried UEFI vs BIOS?

                        gskgerG 1 Reply Last reply Reply Quote 0
                        • ForzaF Offline
                          Forza @bassopt
                          last edited by Forza

                          @bassopt said in VM’s Slow booting:

                          @olivierlambert hi, again!

                          Nah, as told before it’s on initramdisk. After loading grub. A Ubuntu test install I did freezes for almost 20 seconds there.

                          I do have some warnings when I boot xcp-ng regarding x-273 and x-297 .... would that cripple performance that much. ( consumer hardware )

                          Sounds like you have the wrong template. If you disable "quiet" option in grub (press e, then go to the kernel command line) you may see it is error out on enabling some hardware feature. I have seen it happen when trying to enumerate the CPUs. Have a look. You might be able to see in dmesg or journalctl too.

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                          • B Offline
                            bassopt @Forza
                            last edited by

                            @Forza I don’t use xcp-ng anymore. I have a machine i can install it to try out but I haven’t had time lately.

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                            • gskgerG Offline
                              gskger Top contributor @olivierlambert
                              last edited by gskger

                              @olivierlambert Just updated my post with the BIOS vs. UEFI Time to login. Both hypervisors are equally fast with EUFI, although Ubuntu 22.04 on proxmox is now slightly slower. But I guess that is not realy relevant.

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                              • olivierlambertO Offline
                                olivierlambert Vates 🪐 Co-Founder CEO
                                last edited by

                                That's interesting though 🙂

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