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    Negative values for CPU usage (graph)

    Xen Orchestra
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    • T
      tarkh last edited by tarkh

      Hi, guys! I have strange behaviour in Xen Orchestra - on host CPU usage graph (and sometimes on VM also, but really not that frequently) values goes to negative. Attaching screenshots. In Netdata UI everything seems to be fine. Where to dig? Thanx!

      xenorchestra.jpg

      netdata.jpg

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      • olivierlambert
        olivierlambert XCP-ng Team Admin Vates Team last edited by

        That's weird. Hard to tell if there's strange values coming from XAPI RRDs or if it's the chart lib in XO.

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        • J
          jmccoy555 last edited by

          Now you mention it.... I've seen this too and on Disk throughput.

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          • T
            tarkh last edited by

            Because this happens on my machine constantly, I can do some debugging/tests, just give me instructions.

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            • olivierlambert
              olivierlambert XCP-ng Team Admin Vates Team last edited by

              @badrAZ might help you on how to see the values and see more about those data.

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              • badrAZ
                badrAZ XO Team Vates Team last edited by

                Hi @tarkh

                To see what values XAPI RRDs returns, you can use this xo-cli command:

                xo-cli host.stats host=<hostUuid>
                
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                • T
                  tarkh @badrAZ last edited by tarkh

                  @badraz @olivierlambert

                  xo-cli host.stats host=

                  Ok, here is output of this command (I've trimmed CPU section). I can see negative values on some CPUs.

                  "cpus": {
                      ...
                      "8": [
                          4.55,
                          4.55,
                          5.93,
                          -10.639999999999999,
                          -6.2700000000000005,
                          2.1399999999999997,
                          0.9199999999999999,
                          1.4000000000000001,
                          12.3,
                          14.14,
                          -16.07,
                          8.76,
                          20.05,
                          -18.98,
                          2.6100000000000003,
                          2.79,
                          2.31,
                          2.34,
                          2.88,
                          4.8500000000000005,
                          3.1300000000000003,
                          4.68,
                          3.9800000000000004,
                          3.9800000000000004,
                          24.36,
                          -16.42,
                          2.26,
                          5.5,
                          2.44,
                          1.16,
                          4.26,
                          6.3100000000000005,
                          9.1,
                          6.859999999999999,
                          6,
                          3.42,
                          2.34,
                          2.25,
                          1.46,
                          5.18,
                          2.7,
                          3.92,
                          5.3100000000000005,
                          6.909999999999999,
                          7.88,
                          3.6900000000000004,
                          5.19,
                          3.92,
                          5.609999999999999,
                          6.800000000000001,
                          5.609999999999999,
                          5.3,
                          5.7700000000000005,
                          6.0600000000000005,
                          6.660000000000001,
                          6.21,
                          5.99,
                          5.58,
                          1.82,
                          -0.03,
                          3.2399999999999998,
                          5.74,
                          6.1,
                          6.52,
                          6.59,
                          6.69,
                          18.18,
                          5.47,
                          -14.74,
                          10.03,
                          14.44,
                          -16.5,
                          1.37,
                          0.7100000000000001,
                          -0.01,
                          5.71,
                          12.620000000000001,
                          12.620000000000001,
                          -26.369999999999997,
                          -0.59,
                          3.19,
                          1.78,
                          1.27,
                          0.04,
                          24.65,
                          -18.81,
                          -2.79,
                          7.3,
                          0.86,
                          0.96,
                          6.819999999999999,
                          6.419999999999999,
                          6,
                          6.3,
                          6.529999999999999,
                          6.34,
                          5.8999999999999995,
                          6.619999999999999,
                          19.72,
                          6.38,
                          -10.7,
                          4.22,
                          3.74,
                          2.55,
                          -1.01,
                          -0.24,
                          1.05,
                          1.6,
                          2.76,
                          5.93,
                          2.97,
                          0.9299999999999999,
                          1.73,
                          4.18,
                          6.13,
                          5.7,
                          3.9600000000000004,
                          4.8,
                          7.6899999999999995
                      ],
                      ...
                  }
                  
                  badrAZ 1 Reply Last reply Reply Quote 0
                  • badrAZ
                    badrAZ XO Team Vates Team @tarkh last edited by badrAZ

                    @tarkh

                    Please give me the resulted file of this command:

                    wget http://<user>:<password>@<host>/rrd_updates?interval=5\&json=true\&start=$(($(date +%s) - 595))
                    
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                    • T
                      tarkh @badrAZ last edited by

                      @badraz

                      Thank you for your time, I think I finally fixed it. This is how:
                      First time I've installed XO from this guide: https://github.com/ronivay/XenOrchestraInstallerUpdater
                      I used Appliance version - prebuilt VM with XO installed. And there was a problem with negative values.

                      Now I've tried this guide: https://github.com/Jarli01/xenorchestra_updater
                      And instead of using prebuilt VM version, I ran Installation script on previously created Debian 10 VM. After script finish installing XO and all necessary libraries/dependencies, I've all telemetry working properly.

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