Re: ZFS on rpi3

[MJ <mafsys1234%gmail.com@localhost>]

On 23/02/2020 1:12 am, Sad Clouds wrote:
> I'm trying out NetBSD-9 with ZFS on raspberry pi 3. I have 128GB USB SD
> card which has ZFS setup. Noticed that sometimes when under heavy use
> something goes wrong and pgdaemon spins on CPU 100% all the time.
>
> Not sure if this is something to do with small amount of RAM on this
> machine. Are there any tunables like in FreeBSD
>
> vm.kmem_size="330M"
> vm.kmem_size_max="330M"
> vfs.zfs.arc_max="40M"
> vfs.zfs.vdev.cache.size="5M"
>
> that make ZFS play nice when low on RAM? Looked at "sysctl -a" but
> there are only kstat parameters, I assume they are only for statistics
> and don't affect run-time?


ZFS on Raspberry Pi? Nope. Not enough memory. Stick to FFS.

Even a Pi 4 still doesn't have enough, unless all you want to use it for is run ZFS and NOTHING else.