Swap size for servers with several GB of RAM

[Luca <luca.petraglio%annax.ch@localhost>]

Hello,


In the old days, there was a rule to set the swap space twice the size 
of the RAM.

Does this rule still make sens with modern hardware?
For example, how many GB should be dedicated to swap when the server has 
32GB of RAM ?

Thanks.
Luca.