Can't find terminal script to undo changes.

I am really stuck! A few years back I searched for a script that would run the 'purge' on a timer that is set in milliseconds. I set it for 6 hours but now I need to turn it off because it interferes with my music producing and movies and everything. Please help me find this script or if you know what I am talking about then please redirect me. I tried to google and search all forums but my key words kept bringing up 'how to purge inactive ram' but not involving a timer.

Thanks,

Duke