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    Alert: Control Domain Memory Usage

    Scheduled Pinned Locked Moved Solved Compute
    194 Posts 21 Posters 201.4k Views 16 Watching
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    • F Offline
      fasterfourier
      last edited by olivierlambert

      Our Citrix ticket has been worked and they concluded that the NIC driver is to blame here as well. They had us collect debug info using:

      /opt/xensource/libexec/xen-cmdline --set-dom0 page_owner=on
      

      They then confirmed the memory leak was from the NIC driver. They are intending to release a public hotfix for this issue.

      1 Reply Last reply Reply Quote 3
      • olivierlambertO Offline
        olivierlambert Vates πŸͺ Co-Founder CEO
        last edited by olivierlambert

        Nice to see Citrix are also getting to the same conclusions πŸ™‚

        edit: thanks @fasterfourier for your feedback!

        F 1 Reply Last reply Reply Quote 1
        • F Offline
          fasterfourier @olivierlambert
          last edited by

          @olivierlambert

          Official Citrix update has been posted: https://support.citrix.com/article/CTX306529

          1 Reply Last reply Reply Quote 2
          • olivierlambertO Offline
            olivierlambert Vates πŸͺ Co-Founder CEO
            last edited by

            \o/

            What I still find really weird is the fact we had report of the issue far longer before Citrix. And we had roughly 10 people affected while Citrix got only 1 report πŸ€”

            F 1 Reply Last reply Reply Quote 0
            • F Offline
              fasterfourier @olivierlambert
              last edited by

              @olivierlambert

              Probably plenty of Citrix customers were affected, but they would rather reboot on schedule than spend months working through the support process πŸ™‚

              1 Reply Last reply Reply Quote 2
              • olivierlambertO Offline
                olivierlambert Vates πŸͺ Co-Founder CEO
                last edited by

                haha that might be the answer indeed…

                1 Reply Last reply Reply Quote 0
                • J Offline
                  JCastang
                  last edited by

                  Hello,

                  Does this fix has been released or is to be released ?

                  stormiS 1 Reply Last reply Reply Quote 0
                  • stormiS Offline
                    stormi Vates πŸͺ XCP-ng Team @JCastang
                    last edited by

                    @jcastang It is being tested and you can join the effort: yum update intel-ixgbe --enablerepo=xcp-ng-testing. The results are very good, I just want a bit more feedback.

                    J 1 Reply Last reply Reply Quote 1
                    • J Offline
                      JCastang @stormi
                      last edited by

                      @stormi Ok, I will update one of our pools and get some results.

                      1 Reply Last reply Reply Quote 1
                      • J Offline
                        JCastang @delaf
                        last edited by

                        @delaf Can you point me the tool you are using to get memory graphs ? (I want to check my upgraded pool).
                        I was searching in Advance live Telemetry with no luck.

                        delafD 1 Reply Last reply Reply Quote 0
                        • olivierlambertO Offline
                          olivierlambert Vates πŸͺ Co-Founder CEO
                          last edited by

                          Netdata will only give you the last hour.

                          If you want longer metrics, you need to send the data in Prometheus/Grafana.

                          1 Reply Last reply Reply Quote 1
                          • delafD Offline
                            delaf @JCastang
                            last edited by

                            @jcastang we are using a netdata/prometheus/grafana stack.

                            @olivierlambert you can change the retention method and keep much more data on netdata. There is also (since netdata 1.18 i think) a dbengine that allows you to store data on disk.

                            delafD 1 Reply Last reply Reply Quote 0
                            • delafD Offline
                              delaf @delaf
                              last edited by

                              PS: we are not using the netdata config from "Advanced telemetry": we are installing our own netdata config.

                              1 Reply Last reply Reply Quote 0
                              • stormiS Offline
                                stormi Vates πŸͺ XCP-ng Team
                                last edited by

                                dbengine is a bit dangerous on dom0. There used to be a bug where it would keep growing forever, so I don't trust it anymore.

                                delafD 1 Reply Last reply Reply Quote 0
                                • delafD Offline
                                  delaf @stormi
                                  last edited by

                                  @stormi oh I did not know that as I never use it: I only know that it exists πŸ˜‰

                                  delafD 1 Reply Last reply Reply Quote 0
                                  • delafD Offline
                                    delaf @delaf
                                    last edited by

                                    @stormi Hello, some week after, I can confirm that the problem is solved here by using intel-ixgbe.x86_64@5.5.2-2.1.xcpng8.1 or intel-ixgbe.x86_64@5.5.2-2.1.xcpng8.2

                                    delafD 1 Reply Last reply Reply Quote 1
                                    • delafD Offline
                                      delaf @delaf
                                      last edited by

                                      PS: i'm using these 2 scripts to list all interfaces drivers version accross our servers :

                                      $ cat get_network_drivers_info.sh
                                      #!/bin/bash                                                                                                                                                                                                                                                                                                   
                                      
                                      format="| %-13.13s | %-20.20s | %-20.20s | %-10.10s | %-7.7s | %-10.10s | %-30.30s | %-s \n"
                                      printf "${format}" "date" "hostname" "OS" "interface" "driver" "version" "firmware" "yum"
                                      printf "${format}" "----------------------------" "----------------------------" "----------------------------" "----------------------------" "----------------------------" "----------------------------" "----------------------------" "----------------------------"
                                      
                                      if [ $# -gt 0 ]; then
                                          servers=($(echo ${BASH_ARGV[*]}))
                                      else
                                          servers=($(cat host.json | jq -r '.[] | .address' | egrep -v "^192.168.124.9$"))
                                      fi
                                      
                                      for line in ${servers[@]}; do
                                          scp get_network_drivers_info.sh.tpl ${line}:/tmp/get_network_drivers_info.sh  > /dev/null 2>&1;
                                          ssh -n ${line} bash /tmp/get_network_drivers_info.sh 2> /dev/null;
                                          if [ $? -ne 0 ]; then
                                              echo "${line} fail" >&2
                                          fi
                                      done
                                      
                                      $ cat get_network_drivers_info.sh.tpl
                                      #!/bin/bash                                                                                                                                                                                                                                                                                                   
                                      
                                      format="| %-13.13s | %-20.20s | %-20.20s | %-10.10s | %-7.7s | %-10.10s | %-30.30s | %-s \n"
                                      d=$(date '+%Y%m%d-%H%M')
                                      name=$(hostname)
                                      cd  /sys/class/net/
                                      for interface in $(ls -l /sys/class/net/ | awk '/\/pci/ {print $9}'); do
                                          version=$(ethtool -i ${interface} | awk '/^version:/ {$1=""; print}')
                                          firmware=$(ethtool -i ${interface} | awk '/^firmware-version:/ {$1=""; print}')
                                          driver=$(ethtool -i ${interface} | awk '/^driver:/ {$1=""; print}')
                                          YUM=$(which yum)
                                          if [ $? -eq 0 ]; then
                                              packages=$(yum list installed | awk '/ixgbe/ {print $1"@"$2}' | tr '\n' ',')
                                          else
                                              packages="NA"
                                          fi
                                          os_version=$(lsb_release -d | awk '{$1=""} 1' | sed 's/XenServer/XS/; s/ (xenenterprise)//; s/release //')
                                          printf "${format}" "${d}" "${name}" "${os_version}" "${interface}" "${driver}" "${version}" "${firmware}" "${packages}"
                                      done
                                      

                                      PS: host.json file is generated via : xo-cli --list-objects type=host

                                      1 Reply Last reply Reply Quote 1
                                      • stormiS Offline
                                        stormi Vates πŸͺ XCP-ng Team
                                        last edited by stormi

                                        FYI, I have just published security updates today PLUS the fixed ixgbe driver as an official update to XCP-ng 8.1 and 8.2.

                                        We made it. This is the end of this huge thread.

                                        A big thank you to everyone involved in debugging the issue.

                                        And this is not a 🐟 :D.

                                        1 Reply Last reply Reply Quote 6
                                        • F Offline
                                          frankz
                                          last edited by

                                          Its not solving it, but you can run

                                          echo 3 > /proc/sys/vm/drop_caches

                                          to release some of the cache again, without interfering with running processes.

                                          [root@host2 ~]# free -m
                                          total used free shared buff/cache available
                                          Mem: 15958 3308 158 8 12491 2355
                                          Swap: 1023 177 846
                                          [root@host2 ~]# echo 3 > /proc/sys/vm/drop_caches
                                          [root@host2 ~]# free -m
                                          total used free shared buff/cache available
                                          Mem: 15958 3308 2598 10 10051 2751
                                          Swap: 1023 177 846

                                          1 Reply Last reply Reply Quote 0
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