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.
