How to clear swap memory in Linux

The default value for swappiness is 60; however, you can manually set it anywhere between 0-100. Small values cause little swapping to occur, whereas high values can cause very aggressive swapping. A value of zero causes no swapping at all to occur, so if you want to minimize swapping to its lowest possible value without turning it off, you should set it to at least one.

If you wanted to change up the swappiness of your system, the procedure is very straight-forward. You can check your current swappiness setting by running the following command:

$ cat /proc/sys/vm/swappiness

It should look something like this: Image

Now, you can see that my system has a swappiness value of 30. To alter the value, you want to use the following: 

$ sudo sysctl vm.swappiness=x
(where x is the swap value you wish to set)

Disable swap: # swapoff -a

Enable swap: # swapon -a

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