Re: FYI; 14.3: A discord report of Wired Memory growing to 17 GiBytes over something like 60 days; ARC shrinks to, say, 1942 MiBytes

On Tue, 12 Aug 2025 16:10:32 +0930
Darrin Smith <beldin@beldin.org> wrote:

> On Mon, 11 Aug 2025 13:18:47 -0700
> Mark Millard <marklmi@yahoo.com> wrote:
> 
> > Context reported by notafet :
> > 
> > 14.3-RELEASE-p2 GENERIC on amd64 with ZFS in use
> > 
> > RAM:  looks to be 24 GiBytes, not explicitly mentioned
> > SWAP: 8192 MiBytes
> > (From using the image of top's figures.)
> > 
> > Wired:       17 GiBytes 
> > ARC Total: 1942 MiBytes
> > 
> > SWAP used: 1102 MiBytes
> > 
> > The link to the storage channel's message is:
> > 
> > https://discord.com/channels/727023752348434432/757305697527398481/1404367777904463914  
> 
> As of a couple of weeks ago update to latest -CURRENT at the time
> (from previous build of a couple of months ago) I've been
> experiencing a similar but worse case of this. 64G ram on the
> machine, given 2 days it will run out of memory and start killing off
> process, with Wired Memory growing the whole time (at the rate of
> about 1G every 5s at some points). ZFS ARC never passes more then 20G
> the whole time. 

Correction here, 1*M* every 5s...It lasts a day or two at least :D

> For example right now top reports:
> 
> Mem: 1031M Active, 14G Inact, 241M Laundry, 45G Wired, 404M Buf, 2157M
> Free ARC: 17G Total, 2883M MFU, 11G MRU, 256K Anon, 167M Header, 3025M
> 
> (Time for another reboot or it'll have killed things off when I get
> home from work in 8 hours)
> 
> I'm still trying to pin down what exactly it's related too hence. I've
> pretty much elimiated ZFS being the issue and a large poudriere ports
> build or a full build world doesn't seem to push it up. It seems to be
> more closely related to how many graphical things are open at once.
> I've tried drm-61-kmod and drm-66-kmod for my amdgpu polaris 10 video
> card but that seems to make no difference. Next thing I was planning
> on trying was switch to the vesa driver and see if that reduces
> things, but these things take time to fit in around everything else.
> 
> Darrin

Well removing amdgpu altogether made no difference. Still climbing
Wired (I only suspected it was that because it climbed sharpest when I
was logged in). However I have noticed that there is no noticable growth
when using a local login (on ZFS), it's only the NFS based users that
seem to be causing the wired to climb sharply. 

Darrin