I tested this on a lightly loaded Ubuntu 8.04 server.
free swapoff /dev/vg01/lv_swap lvextend -L+500M /dev/vg01/lv_swap grep swap /etc/fstab # find the UUID for the existing swap space # remake the larger swap using the same UUID as before mkswap -U fc7f369e-c655-4a35-a227-a7c725a2b9bc /dev/vg01/lv_swap swapon /dev/vg01/lv_swap free