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The default swappiness of Linux in general is 60 which works very well. 100 means it moves things out of RAM into swap as soon as possible and 0 means try avoid using swap.
In General I have tried different values but found 60 offers the most convenient value, however sometimes I change it to 70 in order to use zramswap more aggressively if memory is used heavily. However if you want to experiment yourself you can try this:
Check current value:
cat /proc/sys/vm/swappiness
Change value temporarily until reboot. You can type the above command again to see it changed:
sudo sysctl vm.swappiness=50
Change permanently:
sudo nano /etc/sysctl.conf
if the 'vm.swappiness=xx' line does not exist in that file, then add it to the bottom of the file (must not be commented out) and change value as appropriate eg: vm.swappiness=50
ctrl x and y to save.
Notes
Notes: If anyone has any other notes or useful commands regarding swap, add them here.
TLDR: 60 or 70 are good values. 60 for normal systems, 70 if you use zramswap and lots of memory for some reason (eg:VM's).
