How do I know I should turn swappiness down? I have 5.5 GiB memory, using 2.8 GiB (~50%), but my swap is using 1.9 GiB of 5.6 GiB (~33%). My computer operates okay but is sluggish at times. So is this a high amount of swap usage or completely normal? TOTAL USED % MEM 5.5 GiB 2.8 GiB 50% SWP 5.6 GiB 1.9 GiB 33% ----------------------------------------- TOTAL 11.1 GiB 4.7 GiB 83% Linux base 3.18.3-201.fc21.x86_64 #1 SMP Mon Jan 19 15:59:31 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux cat /proc/sys/vm/swappiness 60 //default ran sudo sysctl -w vm.swappiness=10 but nothing happened yet.

It is not important how much swap is ussed unless it is full. It is more important how much swap in swap out operations per second you have. Swapin/swapout can be monitored with `vmstat`, `sar` or `dstat`.

If swap is full and swapin/swapout operations are very low, you can just add more swap.