global hash variable perl

hi all, I was able to setup my freeradius to use perl and mysql. Things are working ok. I wanted to use a global hash variable to store information. This way all other requests can also access this hash variable. Is this doable? I know you can use mysql for this purpose, but i wanted to reduce the # of mysql hits. Thanks. -- Computer Science B.S. at Texas A&M C# .Net Developer Server Analyst.