On Tue, Sep 30, 2025 at 1:38 PM Rick Macklem <[email protected]> wrote:
> On Sun, Sep 28, 2025 at 7:59 AM Warner Losh <[email protected]> wrote: > > > > > > > > On Sun, Sep 28, 2025, 4:47 AM Graham Perrin <[email protected]> > wrote: > >> > >> Follow-up to < > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=287719#c6> > >> > >> Good news. > >> > >> 2048 MB is sufficient with root-on-ZFS for an ordinary installation > >> (more than base, less than all of FreeBSD-base) of 15.0-ALPHA4 > >> plus these five non-base packages, some of which are meta: > >> > >> kde plasma6-sddm-kcm sddm virtualbox-guest-additions xorg > >> > >> Beyond initial installations: with 4 G swap enabled, I repeatedly > >> tested forced reinstallation of all packages, > >> > >> pkg upgrade -fUy > >> > >> 1077 packages, 1886 steps. Success. > >> > >> ---- > >> > >> With swap disabled, which I would not recommend: > >> > >> - reinstallation failed, switch from ttyv1 to ttyv2 was > >> impossible, and so on, so I attempted a shut down > >> <https://i.imgur.com/RftLGMu.png> > >> > >> - shut down failed > >> > >> - following a forced stop of the computer, SDDM and the > >> desktop environment were unsable (pkg issue 2441, > >> second incident this morning). > > > > > > It's big enough to install.. but i have lxte + terminal + firefox with 4 > tabs open and I routinely run out of memory and swap heavily. I have a 4GB > Chromebook. > Just a wild guess, but I suspect ZFS might be eating your memory. > You could try something like setting: > vfs.zfs.arc.max to half of your ram and see what happens? > No, it's firefox. The arc usage is sane. firefox with lots of tabs eats memory. It's that simple. > You probably don't want to do this, but it would be interesting to > see what happens if you use UFS. > (Personally, I'd never use ZFS for a root fs, but that's just me.) > Yea, not going to happen. BEs are too useful. Warner > rick > > > > > So one can run in 128MB for light tasks and careful kernel tuning, 512MB > is a more realistic minimum since it lets you install and update. But for X > it's flipped: you need 2G to install but closer to 4G or 8G to run a > complete, but on the lean side, X11 system. > > > > Warner > >> > >> >
