[Bug 229670] ZFS ARC limit vfs.zfs.arc_max from /boot/loader.conf is not respected

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=229670

            Bug ID: 229670
           Summary: ZFS ARC limit vfs.zfs.arc_max from /boot/loader.conf
                    is not respected
           Product: Base System
           Version: 11.2-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: vermaden at interia.pl

The ARC limit in /boot/loader.conf is not used.



Contents of /boot/loader.conf about ARC.

  vfs.zfs.arc_min=32M
  vfs.zfs.arc_max=128M



Current ARC usage from * top -b -o res * command.

# top -b -o res
(...)
ARC: 853M Total, 223M MFU, 168M MRU, 272K Anon, 6253K Header, 456M Other
     77M Compressed, 315M Uncompressed, 4.09:1 Ratio
(...)



ARC should be 128 MB at max, but its about 850 MB ...

... or is there other way to limit ARC usage?


Regards,
vermaden

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