Swap Space

Swap Calculation

RAM Size	Swap Size	(Swap + Hibernate) Size		RAM Size	Swap Size	(Swap + Hibernate) Size
256MB	256MB	512MB		512MB	512MB	1GB
1GB	1GB	2GB		2GB	1GB	3GB
3GB	2GB	5GB		4GB	2GB	6GB
6GB	2GB	8GB		8GB	3GB	11GB
12GB	3GB	15GB		16GB	4GB	20GB
24GB	5GB	29GB		32GB	6GB	38GB
64GB	8GB	72GB		96GB	9GB	105GB
128GB	11GB	139GB

Update » Ubuntu » 22.04

echo 'swapon --show'|sudo bash
:'
NAME      TYPE SIZE USED PRIO
/swapfile file   2G 1.4G   -2
'

cat <<'EXE' | sudo bash
swapoff /swapfile
fallocate -l 29G /swapfile
ls -lh /swapfile && mkswap /swapfile
chmod 0600 /swapfile && swapon /swapfile && swapon --show && free -th
EXE

Update » Ubuntu » 24.04

echo 'swapon --show'|sudo bash
:'
NAME      TYPE SIZE USED PRIO
/swap.img file   6G   0B   -2
'

cat <<'EXE' | sudo bash
swapoff /swap.img
fallocate -l 38G /swap.img
ls -lh /swap.img && mkswap /swap.img
chmod 0600 /swap.img && swapon /swap.img && swapon --show && free -th
EXE

Update » Raspberry Pi 4

cat <<'EXE' | sudo bash
printf '\nbefore:\n';free -th
sed -i 's|CONF_SWAPSIZE=100|CONF_SWAPSIZE=2048|' /etc/dphys-swapfile
service dphys-swapfile restart
printf '\nupdate:\n';free -th
EXE

Playground

echo 'sync;echo 3 >/proc/sys/vm/drop_caches && swapoff -a && swapon -a'|sudo bash free -th		sudo swapon --show cat /etc/fstab
docker network prune -f docker volume prune -f docker system prune -f docker image ls	cat <<'EXE' | bash for d in system network volume do docker ${d} prune -f;done EXE	cat <<'EXE' | ssh [email protected] for d in system network volume do docker ${d} prune -f;done EXE
cat <<'EXE' | sudo bash swapoff /swapfile rm -rf /swapfile swapon --show free -th EXE	cat <<'EXE' | sudo bash swapoff /swap.img rm -rf /swap.img swapon --show free -th EXE

References

Swap » Enable Hibernate With Encrypted Swap Swap » Ubuntu 24.04 & Hibernation Swap » Increase swap space Swap » Delete a swap file
SSH » Connection Hang Forever Ruby on Rails Free Up RAM TensorFlow Homebrew Linuxbrew PyEnv TMux CURL Tar	Disk Performance Raspberry Pi 7Zip