Swap

How to handle swappiness

Start top and press O then p to sort by swap.

top -c

Look at what is using swap. si and so is swap in and swap out.

vmstat 1

To return swap to ram.

swapoff -a; swapon -a

See swappiness value.

cat /proc/sys/vm/swappiness

To set swippiness value.

sudo sysctl vm.swappiness=0