Zram vs swap partition vs swapfile

[cactux]

@dalto

I have 64GB of RAM and without some swap I find that the oom killer will start killing applications at times.

@dalto, do you use systemd-oom.service?

I see that it has a conf file: /etc/systemd/oom.conf

[OOM]
#SwapUsedLimit=90%
#DefaultMemoryPressureLimit=60%
#DefaultMemoryPressureDurationSec=30s

What values would be your recommendation?

Please see for mem and swap configuration on this laptop: Zram vs swap partition vs swapfile - #77 by cactux

[dalto]

@cactux

@dalto, do you use systemd-oom.service?

I do not.

[MichelN]

I just added zram to my gaming notebook (just in case).

[Schlaefer]

Just don’t forget to disable zswap, otherwise zram will behave wonky.

[MichelN]

I did a clean install without swap yesterday, only enabled zram. Zram shows up as “swap” device.

[Schlaefer]

The Arch kernels enable zswap by default, if you add a swap device it will kick in automatically.

If cat /sys/module/zswap/parameters/enabled gives you a Y it’s enabled.

See e.g. bullet point two here.

[MichelN]

Thanks! turned it off.