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    High CPU user util

    Scheduled Pinned Locked Moved General pfSense Questions
    15 Posts 2 Posters 1.5k Views
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    • stephenw10S
      stephenw10 Netgate Administrator
      last edited by

      Check the other graphs there, do you see traffic flow increase at the same times?

      Gateway issues? Packet loss?

      Steve

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      • B
        BlijeGub
        last edited by BlijeGub

        I can't see historical traffic data but when the cpu is high I am not seeing an increase in traffic on the live traffic graph. And if I do a dsl reports speed test I get an A+ rating on everything with 700mbps so there doesn't seem te be any issue there. It is probably some php script it is running in the background but I don't know where to find out what it is doing exactly. And I don't get why this is happening this pfSense install is only 2 days old now.

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        • stephenw10S
          stephenw10 Netgate Administrator
          last edited by

          Try running ps auxwwd. That may show you what script is running.

          Steve

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          • B
            BlijeGub
            last edited by BlijeGub

            493ac122-5ef4-4a9f-9c90-a38abbc32922-image.png
            The idle process is down by 100% because its a quad core cpu but no other script is running with a supstantial amount of cpu usage.

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            • stephenw10S
              stephenw10 Netgate Administrator
              last edited by

              And it was showing the increased usage in monitoring while that command was run?

              Steve

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              • B
                BlijeGub
                last edited by

                Yes I waited for it to start having increased cpu usage.

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                • stephenw10S
                  stephenw10 Netgate Administrator
                  last edited by

                  Actually you should be able to see the command in the output of top -aSH. The gui system activity looks to have just truncated it. I would guess it's prefixes.php from that list though.
                  Do you have IPv6 configured? Do you need it?

                  Steve

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                  • B
                    BlijeGub
                    last edited by BlijeGub

                    3f69f041-e3fd-4f61-81b9-f77c9abbe8b8-image.png
                    indeed prefixes.php and I do have ipv6 configured and am using it for internet connectivity and to get a better understanding on how ipv6 works.

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                    • stephenw10S
                      stephenw10 Netgate Administrator
                      last edited by

                      Hmm, well I would suggest reviewing exactly what you have configured there. It's hard to imagine what that is doing for 1h using that much CPU.
                      I'm guessing 2hrs is the lease time somewhere...

                      Steve

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                      • B
                        BlijeGub
                        last edited by

                        Fixed by disabling dhcpv6 which I didn't even need because router advertising is enough to get ipv6 working. Still don't know why dhcpv6 was causing the cpu spikes though.

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