Linux How to Extend Swap Space
Display swap usage summary
# swapon -s
Show how many space swap needs in megabytes
# free -m
Create new swap disk.
# fdisk /dev/sdb
Format new disk to swap format
# mkswap /dev/sdb1
Add new part of swap
# swapon /dev/sdb1
Verify if there is more space in swap space
# free -m
Append next line to file /etc/fstab.
/dev/sdb2 swap swap defaults 0 0
If you need old swap use
# swapoff /dev/sda6