Configure Swap Area according to formula for Oracle

According to the Installation manual and Note 169706.1. The swap space needs
to be configured as follows:

If RAM = 1024MB to 2048Mb
then 1.5 times RAM
elseif RAM > 2048MB and 8192MB
then .75 times RAM

Following example show all the three cases:

1. IF RMAM is 2GB then it lies in 1st condition as per formula then swap area should be 2*1.5= 3 GB

2. If RAM is 4 GB then it lies in 2nd condition as per formula then swap area should be  4 *1 = 4 GB.

3. IF RMAN is 10 GB then it lies in 3rd condition as per formula then swap are should be 10*0.75=7.5 GB