megamanheroful

Every time i load the server it says Warning cant keep up did the time change or is the server overloaded i looked it up and it says every where you need to add more ram which dos'nt make sense as i have 10g so i added 4g to java but that did'nt do anything and i could'nt find any tuturials and the forums wont let me look it up as it is to common so can any ne PLEASE HELP ME