Change swap size in Ubuntu 18.04 or newer
https://bogdancornianu.com/change-swap-size-in-ubuntu/
Change swap size in Ubuntu 18.04 or newer
[Updated July 26, 2020]: Change swapfile permission; Set swapfile in /etc/fstab.
Swap is a special area on your computer, which the operating system can use as additional RAM.
Starting with Ubuntu 17.04, the swap partition was replaced by a swap file. The main advantage of the swap file is easy resizing.
Note: before running the following commands, please make sure you have a backup of your data!
In the following example, we’ll extend the swap space available in the /swapfile from 4 GB to 8 GB.
- Turn off all swap processes
1 | sudo swapoff -a |
2. Resize the swap
1 | sudo dd if = /dev/zero of= /swapfile bs=1G count=8 |
if = input file
of = output file
bs = block size
count = multiplier of blocks
1 | sudo chmod 600 /swapfile |
4. Make the file usable as swap
1 | sudo mkswap /swapfile |
5. Activate the swap file
1 | sudo swapon /swapfile |
6. Edit /etc/fstab and add the new swapfile if it isn’t already there
1 | /swapfile none swap sw 0 0 |
7. Check the amount of swap available
1 | grep SwapTotal /proc/meminfo |
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