Size of memory needed for HASH table - Is there a formula?

[kannand]

I'm just trying to experiment SAS HASH feature.  Is there a golden rule or a formula to calculate the memory that will be needed to process a HASH table of a certain number of columns with a key with specific number of rows/entries ?   The URL article I was reading through is listed below cautions that programmers may experience running out of memory situations while processing HASH tables beyond a certain size. 

http://analytics.ncsu.edu/sesug/2011/BB08.Lafler.pdf

[SASKiwi]

Searching SAS Support is always a good place to start:

http://support.sas.com/kb/34/193.html