Zswap enabled by default - Could give a bit more reliability with more tabs

[andiohn]

Add these to the cmdline.txt when installing.

zswap.enabled=1 zswap.compressor=lz4 zswap.zpool=z3fold

This will allow compressable objects to be compressed and stored compressed in ram. On a raspberry pi 3, it shouldn't effect performance much at all. It's actually recommended by Ubuntu. See this:

https://www.cnx-software.com/2022/01/13/ubuntu-22-04-zswap-raspberry-pi-4-2gb-ram/

I'm going to try it to see if my once a day reboot will still be ok. Right now I have a video file within a website and it doesn't last the day right now.

[andiohn]

Here's more details: MichaIng/DietPi#6205

[andiohn]

https://www.reddit.com/r/linux/comments/11dkhz7/zswap_vs_zram_in_2023_whats_the_actual_practical/

[andiohn]

https://linuxcommunity.io/t/raspberry-pi-performance-add-zram-and-these-kernel-parameters/818

[andiohn]

Here's some more reading. https://ikarus.sg/using-zram-to-get-more-out-of-your-raspberry-pi/
This one was very informative.

[andiohn]

Ok, so enabling it on a 4GB pi 3 immediately makes it more responsive. I did the top command.

zswap.enabled=1
zswap.compressor=lz4
zswap.zpool=z3fold

[debloper]

Thanks, I can't verify this myself (don't have a Pi3 or other lower powered RPi at hand), but I realize how this can give a performance boost for them.

This would be a toggle on the dashboard in the next release, for anyone who want to opt-in.

[andiohn]

The bottom guy has more details here on an updated method for zswap and log2ram as well.

https://ikarus.sg/reduce-sd-card-wear-on-your-raspberry-pi-with-zram-config/

I think it'd be worth figuring out how we'd like this implimented because it will probably help keep these systems running longer without messing about.