I wanted to ask all who might be interested too, and know the answers to this, first, in short, /dev/zram0 my system says is a swap file. It's really no big deal, but I would rather not have one. I see the old 'mkswap' command is gone, I look at the filesystem and see no visible swap. Is there a way to turn this off? I really don't think my memory needs to swap out pages to the filesystem; but then, maybe it could use it. Turning it off probably wouldn't hurt.

On 10/2/22 13:52, Bill Cunningham wrote: >      I wanted to ask all who might be interested too, and know the > answers to this, first, in short, > > > /dev/zram0 my system says is a swap file. It's really no big deal, but > I would rather not have one. I see the old 'mkswap' command is gone, I > look at the filesystem and see no visible swap. Is there a way to turn > this off? I really don't think my memory needs to swap out pages to > the filesystem; but then, maybe it could use it. Turning it off > probably wouldn't hurt. > >      And also what comes goes, my system went down and no worries. But > I did try to rescue the system with e2fsck. When done after quite some > time. All the showed up was 'lost+found' and in that directory was a > lot of directories that were numbered. Some had the hash in front. I > guess I really did a number on it. Nothing was lost worth keeping. It > needed cleaned anyway. If you decide you do need swap checkout zswap.  It compresses swapped out pages and stores them in local RAM.  It's a kernel option and is activated by adding "zswap.enabled=1" to the linux boot lines in your grub.cfg. Because it's not a command, per se, there's no man page.  A web search on zswap will return plenty of info.

On 10/2/22 15:25, Samuel Sieb wrote: > On 10/2/22 15:18, Mike Wright wrote: >> On 10/2/22 13:52, Bill Cunningham wrote: >>>      I wanted to ask all who might be interested too, and know the >>> answers to this, first, in short, >>> >>> >>> /dev/zram0 my system says is a swap file. It's really no big deal, >>> but I would rather not have one. I see the old 'mkswap' command is >>> gone, I look at the filesystem and see no visible swap. Is there a >>> way to turn this off? I really don't think my memory needs to swap >>> out pages to the filesystem; but then, maybe it could use it. >>> Turning it off probably wouldn't hurt. >>> >>>      And also what comes goes, my system went down and no worries. >>> But I did try to rescue the system with e2fsck. When done after >>> quite some time. All the showed up was 'lost+found' and in that >>> directory was a lot of directories that were numbered. Some had the >>> hash in front. I guess I really did a number on it. Nothing was lost >>> worth keeping. It needed cleaned anyway. >> >> If you decide you do need swap checkout zswap.  It compresses swapped >> out pages and stores them in local RAM.  It's a kernel option and is >> activated by adding "zswap.enabled=1" to the linux boot lines in your >> grub.cfg. >> >> Because it's not a command, per se, there's no man page.  A web >> search on zswap will return plenty of info. > > zram is a compressed memory block device used by default for swap in > Fedora now.  zswap is different.  It intercepts swap writes and caches > them compressed in RAM.  It still requires an actual swap partition as > well unlike zram. Thanks. zram requires creation of a memory swap area.  Where would that typically be done?  rc.local ?  If it overflows does it fall back to a disk swap partition?

    I wanted to ask all who might be interested too, and know the answers to this, first, in short, /dev/zram0 my system says is a swap file. It's really no big deal, but I would rather not have one. I see the old 'mkswap' command is gone, I look at the filesystem and see no visible swap. Is there a way to turn this off? I really don't think my memory needs to swap out pages to the filesystem; but then, maybe it could use it. Turning it off probably wouldn't hurt.