@RitterSpark almost 100% sure you got some memory leak, rarely any memory leaks that has to do with tfs itself. Rewrite all your globalevents and see if it fixes the problem.
(Ill report this so they can edit it)
If they are running on windows it could be abit unstable if you got active players, ive hosted my rlmap on my old computer with 4gb and ubuntu, was stable till I had 20 players during my test phase, then I moved it to my computer with 16gb and windows and it worked just fine, depends mostly on how your server is programmed.
Some random evo server can use just as much memory as a well scripted rlmap.