Linux partition expansion tips for adjusting Swap space size

View the current Swap file location and size

php editor Apple introduces you to the partition expansion techniques for adjusting the Swap space size in Linux systems. Swap space plays an important role when the system memory is insufficient. Expanding the Swap space can improve system performance and stability. This article will introduce in detail how to quickly and safely expand the Swap partition in Linux systems, helping you better manage system resources and improve work efficiency.

Execute the following command:

sudo swapon --show

This will display all active swap space, including its type (e.g. file or partition), size, usage and location.

If you are only interested in file paths or partition paths, you can view the same information via the /proc/swaps file:

cat /proc/swaps

This will list all swap spaces on the system, including their locations.

Set up a new Swap space

On Manjaro (an Arch-based Linux distribution), you can set up swap space using several methods. The following are the general steps for creating and setting up swap space:

Create swap file:

Select a directory (usually /) and create a swap file. For example, create a 4GB swap file:

sudo fallocate -l 4G /swapfile

Set the correct permissions:

For security reasons, you should ensure that the swap file can only be read and written by the root user:

sudo chmod 600 /swapfile

Format to swap:

sudo mkswap /swapfile

Enable swap:

sudo swapon /swapfile

Make swap persistent：

To maintain swap settings across reboots, entries need to be added to the /etc/fstab file. First open the fstab file using a text editor:

sudo nano /etc/fstab

Then, add the following lines at the end of the file:

/swapfile none swap defaults 0 0

Save and close the file.

Adjust Swappiness (optional):

Swappiness is a value that indicates how aggressively the system should use swap space. Values ​​range from 0 to 100, with 100 indicating the most active use of swap.

View the current swappiness value:

cat /proc/sys/vm/swappiness

If you need to change it, for example, set it to 10:

sudo sysctl vm.swappiness=10

To make it persistent, add or modify the vm.swappiness value in the /etc/sysctl.conf file.

Please note that although the above steps describe how to use a swap file, you can also choose to create a swap partition on your hard drive. Choosing to use a swap file or a swap partition depends on your specific needs and preferences.

Adjust Swap space size

NAMETYPE SIZE USED PRIO
/swapfile file 512M 397.9M -2

From the output provided, you currently have a /swapfile of size 512M as swap file, and it has used 397.9M. If you want to increase the size of this swap file, you can follow the steps below:

Close the current swap file:

Before resizing, you need to close the current swap file:

sudo swapoff /swapfile

Adjust the size of the swap file：

Suppose you want to resize the swap file to 1GB:

sudo fallocate -l 1G /swapfile

Reformat to swap:

sudo mkswap /swapfile

Re-enable swap:

sudo swapon /swapfile

Check the new swap size:

Use the swapon --show command again to confirm the new swap file size:

sudo swapon --show

Finish

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