I have recently created a Minecraft server and need to add ram, I have 16 GB of ram, if that helps.
Edit: Anytime I increase the ram past 1GB it wont start.
Did you create it local or with a server provider?
If you use the server local you have to edit your start.bat
java -Xmx1024M -Xms1024M -jar minecraft_server.jar nogui
1024M = 1 GB
2048M = 2 GB
and so on - just change the value in your start-script