Re: Disable btrfs memory swap file

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On Tue, Jun 27, 2023 at 2:40 AM Samuel Sieb <samuel@xxxxxxxx> wrote:
>
> On 6/26/23 23:20, Jeffrey Walton wrote:
> > On Tue, Jun 27, 2023 at 2:14 AM Samuel Sieb <samuel@xxxxxxxx> wrote:
> >>
> >> On 6/26/23 20:48, Jeffrey Walton wrote:
> >>>
> >>> I've got a Fedora 38 install (upgrade from F37). The install happened
> >>> with Anaconda. Anaconda created the compressed memory swap file. I
> >>> resized the disk and added a proper swap partition. Now I need to
> >>> modify /etc/fstab and disable the compressed memory swap file. In the
> >>> screen text below, /dev/nvme0n1p4 is the new partition.
> >>>
> >>> My Google-fu really sucks today. I cannot find a discussion of it.
> >>>
> >>> How do I modify fstab to remove the compressed memory swap file?
> >>
> >> Why would you want to?
> >
> > The compiler is crashing in cc1plus. I'm out-of-memory on a machine
> > with 16GB of RAM. Effectively I'm DoS'd with the btrfs default
> > strategy. Time to do something different... like get rid of that
> > compressed swap file in RAM, use a real swap file, and use memory for
> > programs.
>
> It has nothing to do with btrfs.  That's just the default and it works
> really well.  You get lots of "extra" memory without the lag of going to
> the disk.  You could add the disk swap as well.  You don't have to
> remove the zram for that.

I guess that's in the eye of the beholder. I don't like being DoS'd.

Fedora with btrfs is worse than Solaris. Solaris will work with 8 GB
of RAM (but usually not less). Fedora can't operate with 16 GB. Ugh...

I'll install a different OS to sidestep the problem.

Jeff
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