[Bug 212269] ZFS ARC appears to ignore vfs.zfs.arc_max

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Tue Aug 30 19:34:49 UTC 2016


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212269

            Bug ID: 212269
           Summary: ZFS ARC appears to ignore vfs.zfs.arc_max
           Product: Base System
           Version: 10.2-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: conf
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: scratch65535 at att.net
                CC: freebsd-amd64 at FreeBSD.org
                CC: freebsd-amd64 at FreeBSD.org

ZFS was grabbing all but 1G of my server-of-all-work's 32G memory (the listed
default behavior, which seems ridiculous). To afford other jobs memory in which
to run, I put 

vfs.zfs.arc_max="8G" 

into /boot/loader.conf and rebooted.  But tops and zfs-stats continue to report
that ZFS still claims 28G for itself.  

Thinking it might be a regression to when "M" and "G" weren't being
interpreted, I tried entering the limit in bytes (8796093022208) instead but it
made no difference.

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