Netgate Discussion Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Search
    • Register
    • Login

    ZFS Warning during boot, is there something to worry about?

    Scheduled Pinned Locked Moved 2.1 Snapshot Feedback and Problems - RETIRED
    4 Posts 4 Posters 11.9k Views
    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.
    • w0wW
      w0w
      last edited by

      Quote from system log:

      May 9 19:28:31	kernel: ZFS storage pool version 28
May 9 19:28:31	kernel: ZFS filesystem version 5
May 9 19:28:31	kernel: in /boot/loader.conf.
May 9 19:28:31	kernel: Consider tuning vm.kmem_size and vm.kmem_size_max
May 9 19:28:31	kernel: ZFS WARNING: Recommended minimum kmem_size is 512MB; expect unstable behavior.
May 9 19:28:31	kernel: add "vfs.zfs.prefetch_disable=0" to /boot/loader.conf.
May 9 19:28:31	kernel: ZFS NOTICE: Prefetch is disabled by default on i386 -- to enable,
May 9 19:28:31	kernel: Trying to mount root from ufs:/dev/ad4s1a
      1 Reply Last reply Reply Quote 0
      • J
        jasonlitka
        last edited by

        pfSense isn't using ZFS so I'm going to go with no.  Those are pretty standard messages though.  ZFS runs like crap on anything less than 4GB of RAM.

        I can break anything.

        1 Reply Last reply Reply Quote 0
        • jimpJ
          jimp Rebel Alliance Developer Netgate
          last edited by

          ZFS can be used if you monkey with the web-based installer (go to /installer/ when booted from the CD) but if you didn't manually go out of your way to set it up, it won't be used.

          Remember: Upvote with the 👍 button for any user/post you find to be helpful, informative, or deserving of recognition!

          Need help fast? Netgate Global Support!

          Do not Chat/PM for help!

          1 Reply Last reply Reply Quote 0
          • D
            dhatz
            last edited by

            I have also noticed the ZFS memory warnings and wanted to ask if the new 2.1-RC0 kernel has a larger memory footprint compared to a v2.1 kernel from a few months before.

            I'm asking because a 256MB VM running the latest 2.1-i386 image with no packages installed, on a quiet network (only 17 states) consumes about 45% of memory, according to the Dashboard info …

            1 Reply Last reply Reply Quote 0
            • First post
              Last post
            Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.