XCP-ng
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Groups
    • Register
    • Login

    Solved VM's going really slow after 3 - 4 weeks

    Compute
    9
    36
    1479
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • B
      Berrick @Berrick
      last edited by

      Seasons greetings to all,

      So the slowness of is creeping back. Still cant find any thing obvious
      Latest Xen Top

      4ccf84eb-8d2e-4434-bafc-cd38c43007f2-image.png

      Due to business pressures we have had to reboot the physical server.
      So now have to wait for the issue to re occur.

      there were 5 more patch's which have been applied.

      If anyone has any other suggestion of what to check, specific logs to search etc, etc they would be gratefully received

      Kind regards

      tjkreidlT 1 Reply Last reply Reply Quote 0
      • olivierlambertO
        olivierlambert Vates πŸͺ Co-Founder🦸 CEO πŸ§‘β€πŸ’Ό
        last edited by

        Adding @fohdeesha in the loop

        1 Reply Last reply Reply Quote 0
        • Tristis OrisT
          Tristis Oris
          last edited by

          can't say that time from reboot a cause of problem, but sometimes i'm feel something about it. Even ssh connection takes tooooo long, like 10 sec in local network. Same for http speed for small services without any load.

          1 Reply Last reply Reply Quote 0
          • tjkreidlT
            tjkreidl Ambassador πŸ“£ @Berrick
            last edited by

            @Berrick Run iostat and see if anything shows up as slow or saturated with your storage I/O.

            1 Reply Last reply Reply Quote 1
            • EddieCh08666741E
              EddieCh08666741
              last edited by

              hi Berrick, most of the issues that happen like this is due to IO i believe. I've been using XCP ng for many years and I have about 100 VMs. I love xcp and its the best out there. There are few instance that my VM starts to crawl to be unusable.

              1. One of the disk fails in the raid and cause my VMs on that particular server to crawl.
              2. Too little memory provisioned. Heavy usage.

              Hope my above helps

              tjkreidlT 1 Reply Last reply Reply Quote 0
              • tjkreidlT
                tjkreidl Ambassador πŸ“£ @EddieCh08666741
                last edited by

                @EddieCh08666741 Indeed. Run top and make sure you have adequate resources allocated for dom0 for both memory and CPU. There should be no swapping to speak of and the CPU should be nowhere close to 100% in use.

                B 1 Reply Last reply Reply Quote 0
                • B
                  Berrick @tjkreidl
                  last edited by

                  Thanks for all the replies.
                  I will be checking when the issue starts again in a few weeks and report back.

                  From previous xentop output I don't believe Dom0 is showing high CPU or Memory.

                  I also dont think there is a problem with the physical disks.

                  B 1 Reply Last reply Reply Quote 0
                  • B
                    Berrick @Berrick
                    last edited by

                    @Berrick
                    So its been a while since my last post on this topic but finally I think we have bottomed this issue out! πŸ™‚

                    So the long and the short.
                    Nothing we tried, checked or diagnostics ran up to this point showed any issue.
                    Then one Monday morning there was one alert from the iLO about "Corrected Memory Error threshold exceeded"

                    As this server was due a memory upgrade to LV memory soon and we would need to reboot to clear the alert we brought the upgrade forward.

                    Since the new memory was installed, tempting fate here, it has been OK

                    Thanks to all that offered advice.

                    Kind regards

                    1 Reply Last reply Reply Quote 0
                    • olivierlambertO
                      olivierlambert Vates πŸͺ Co-Founder🦸 CEO πŸ§‘β€πŸ’Ό
                      last edited by

                      Oh wow. So something was wrong with the hardware, specifically the memory, and potentially more errors and error correction trying to keep up, slowing down everything. Is it a good recap?

                      B 1 Reply Last reply Reply Quote 0
                      • B
                        Berrick @olivierlambert
                        last edited by

                        @olivierlambert said in VM's going really slow after 3 - 4 weeks:

                        Oh wow. So something was wrong with the hardware, specifically the memory, and potentially more errors and error correction trying to keep up, slowing down everything. Is it a good recap?

                        To be honest I am not entirely sure.
                        I tested the memory my self in the early stages of this issue with memtest. In the past memtest has flagged memory issue that HP built in diags hasn't but it ran clean. 😞

                        The server was rebooted prior to replacing the memory out of curiosity and everything came up OK no errors.

                        So we assume that something was wrong with the memory. And now we have are fingers crossed that that is the end if it πŸ™‚

                        1 Reply Last reply Reply Quote 1
                        • B Berrick has marked this topic as solved on
                        • First post
                          Last post