| Disable swap: | swapoff -v /dev/vgroot/lvswap |
| Reduce the LV: | lvreduce /dev/vgroot/lvswap -L -{size} |
| Disable swap: | swapoff -v /dev/vgroot/lvswap |
| Increase the LV: | lvresize /dev/vgroot/lvswap -L +{size} |
| Format swap partition: | mkswap /dev/vgroot/lvswap |
| Turn swap back on: | swapon -av |
To change on the fly:
# echo 25 > /proc/sys/vm/swappiness
To make permanent:
vm.swappiness=25# sysctl -p