dd if=/dev/urandom of=/dev/zero bs=2GB count=999999 iflag=fullblock &
watch -n 0.1 free -m


Android Pixel 3a
              total        used        free      shared  buff/cache   available
Mem:        3678548     1394368     1742132        7540      542048     2007976
Swap:       2097148      830812     1266336
dd if=/dev/urandom of=/dev/zero bs=2GB count=999999 iflag=fullblock
1 minute then ctrl+z
             total        used        free      shared  buff/cache   available
Mem:        3678548     3241816       73076        6356      363656      161592
Swap:       2097148      853696     1243452
Wait a few minutes.
              total        used        free      shared  buff/cache   available
Mem:        3678548     3254972       62972        6032      360604      149152
Swap:       2097148     2097148           0
Termux app dies from low memory.

/system/bin/swapon /storage/emulated/0/SWAP/swap.swp
Bad system call
proot /system/bin/swapon /storage/emulated/0/SWAP/swassp.swp
swapon: Couldn't swapon '/storage/emulated/0/SWAP/swassp.swp': Function not implemented


HP 110-1000, 2GB RAM, 500GB SSD, N270 CPU.
Linux 4.19.0-13-686 #1 SMP Debian 4.19.160-2 (2020-11-28) i686 GNU/Linux
Uptime 84 days
              total        used        free      shared  buff/cache   available
Mem:        2056468      106664      690680       31620     1259124     1686320
Swap:      17334796       45568    17289228

dd if=/dev/urandom of=/dev/zero bs=2GB count=999 iflag=fullblock
Wait 1 minute then ctrl+z to pause.
             total        used        free      shared  buff/cache   available
Mem:        2056468     1582692      154668       14176      319108      241592
Swap:      17334796      338688    16996108
dd if=/dev/urandom of=/dev/zero bs=2GB count=999 iflag=fullblock
Wait 1 minute then ctrl+c to close.
              total        used        free      shared  buff/cache   available
Mem:        2056468      347148     1652572       11240       56748     1539308
Swap:      17334796     1354752    15980044
fg  and ctrl+c to close the other.
              total        used        free      shared  buff/cache   available
Mem:        2056468       92640     1902728       11296       61100     1791644
Swap:      17334796       84224    17250572