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    High Memory Usage

    Scheduled Pinned Locked Moved General pfSense Questions
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    • B
      beloc
      last edited by

      Hello,

      I have a pfSense+ box that is using alot of memory and I am wondering if anyone else is seeing this or if its something I need to look at.

      This box has 32GB of RAM and it is using 90% of that. It is running NTOP but I have never see NTOP use this much RAM. It is also running pfBlocker, but the same is true for that process. Every things seems to run fine, I just keep getting alerts about it. I know that pfSense is using ZFS underneath, if it the ARC?

      Thank you for any direction.

      Screenshot 2025-03-01 at 8.32.02 PM.png

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      • S
        SteveITS Galactic Empire @beloc
        last edited by

        @beloc Diagnostics > System Activity will show ARC usage.

        It’s tuneable, see https://docs.netgate.com/pfsense/en/latest/hardware/tune-zfs.html

        Pre-2.7.2/23.09: Only install packages for your version, or risk breaking it. Select your branch in System/Update/Update Settings.
        When upgrading, allow 10-15 minutes to restart, or more depending on packages and device speed.
        Upvote 👍 helpful posts!

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        • B
          beloc @SteveITS
          last edited by

          @SteveITS

          I figured it was the ARC. I may change it to be lower just because there is nothing that really needs to run out of ARC here. Thank you for the help.

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          • stephenw10S
            stephenw10 Netgate Administrator
            last edited by

            Hmm, hard to imagine anything using that much RAM. But yes check the top output or ps -auxwd.

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