SWAP on Android using termux

Swap on Android with termux.md

Requirements: Termux, Root (preferably Magisk).

Open termux and give it root permissions

Type su to escalate the permissions

Now enter the command dd if=/dev/zero of=swapfile bs=1024 count=6144k replacing 6144k with as much swap as you need, in this case 6GB

Once its done, enter mkswap swapfile to create the sawp file and swapon swapfile to enable the swap file

Thank you!

To enable this across reboots I had to create a script inside Magisk boot script service.d path. But with a delay of 2 minutes, otherwise the script would run before zRAM allocation and the performance was terrible. It needs to run after it, because zRAM is faster storage and needs to be used before the swap file in the SSD.

#!/system/bin/sh
# Delay ensures zRAM is loaded first so swap priority if this swap file is lower.
sleep 120
swapon /data/swapfile

This has effectively solved all lagging issues on my phone 😁