Re: curious crashes when under memory pressure

From: Miroslav Lachman <000.fbsd_at_quip.cz>
Date: Sat, 04 Jan 2025 17:30:24 UTC 
On 04/01/2025 17:27, Chris Torek wrote:
> On Sat, Jan 4, 2025 at 7:01 AM Peter 'PMc' Much
> <pmc@citylink.dinoex.sub.org> wrote:
>>> I'm swapping to a zfs mirror
>>
>> Well, You shouldn't do that.
> 
> Why not? Swapping to a *file* on zfs has obvious issues, but swapping
> to a mirrored swap partition seems like it should be entirely safe. A
> bit slow (double writes) but I spent $ on RAM rather than M.2 drives
> on the theory that I can add those later as needed.

Do you have swap on ZFS or not (in the first post you said "swapping to 
a zfs mirror")? If yes then it can cause the problems in memory pressure 
because system has no free memory but ZFS needs memory.
If you want the swap on a mirror, then use separate partition on 2 disks 
and add gmirror on top of them.

Kind regards
Miroslav Lachman