Get rid of SWAP in Linux
If for whatever reason you wish not to use your Linux SWAP anymore, you can use the swapoff command. Do a swapon -s to see to which partition SWAP belongs to then a free -mt to check available memory. If you still want to give up your SWAP, try a
swapoff /dev/hdxx
where /dev/hdxx is the location of the SWAP. You can later reactivate SWAP with swapon.
to reactive swap..need to use the command #swapon -a