Reduce the chance of using swap if you have enough memory

Reduce the chance of using swap if you have enough memory

Answer:

If you have enough memory but the Linux is still using swap at sometimes, you can adjust the swappiness parameter

1. See the current setting

# cat /proc/sys/vm/swappiness
60

The range is from 0 to 100 (lower value means you system will try to avoid swap as much as possible)

2. To set a lower value at runtime

# echo "30" >  /proc/sys/vm/swappiness

3. To set it permanently

# /sbin/sysctl -w vm.swappiness=30

Reboot after the changes.