View and resize the swap partition

Check the swap partition size:
cat /proc/swaps
Filename Type Size Used Priority
/dev/mapper/VolGroup00-LogVol01 partition 524280 0 -1
/tmp/swapfree file 262136 0 -2

Adjust the swap size:
dd if=/dev/zero of= swapfree bs=32k count=8192 (256MB)
mkswap swapfree
swapon /tmp/swapfree

stopped:
swapoff /tmp/swapfree
loaded at startup:
in the /etc/fstab file, add the following line:
/tmp/swapfree swap swap defaults 0 0

check swap
#swapon -s