A common question we get from users is "Why is my Minecraft server's RAM at 100%?" - the answer is really simple: you're running too much on too small a server.
ServerFlex supports almost every modpack there is for Minecraft, however this doesn't mean you can run every modpack on every pricing plan.
If you are having issues with your server being at 100%, or close to 100% RAM then upgrade your server to a higher plan or get in touch with our team.