Changes in vfs.zfs.arc_max on 13

Andriy Gapon avg at
Wed May 12 06:40:26 UTC 2021

On 11/05/2021 20:09, Pete Wright via freebsd-fs wrote:
> The next issue I am seeing is that when setting this variable the example from 
> the handbook states you can do something similar to this (section
> vfs.zfs.arc_max="40M"
> This throws an error on my system:
> $ sudo sysctl vfs.zfs.arc_max=2048M
> sysctl: invalid unsigned long '2048M'
> $ sudo sysctl vfs.zfs.arc_max=2G
> sysctl: invalid unsigned long '2G'
> Using the human unfriendly form works though:
> $ sudo sysctl vfs.zfs.arc.max="2000000000"
> vfs.zfs.arc.max: 0 -> 2000000000
> $
> Is this a bug, or would it be best to also update the documentation accordingly 
> to reflect this?  Personally I like the old behavior as it's easier on my eyes.

Are you sure that that is a recipe for sysctl?
It looks like it was for loader.conf.

Andriy Gapon

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