How To Allocate More RAM to Minecraft 1.18 (Give More RAM to Minecraft 1.18!)
Once you open ATLauncher, you will see a list of tabs on the right side of the window. Select “Settings” and open the Java/Minecraft tab. Under this tab, you will see Initial and Maximum Memory/RAM options. Increase the Maximum Memory/RAM by inputting the amount of RAM you want to allocate into your Minecraft server.