How do I assign more ram to a Minecraft 1.14.3 server?

I installed a Minecraft 1.14.3 server at home. However, this only starts with 256M Ram. How can I increase this?

You can program a bash file containing the server with the command

"java -Xmx1024" -Xms1024 -jar forgeServerFile.jar "

Just load 1024 on top of it to enable 1 gigabyte more RAM.

Start. I'm not sure but it would have to work, otherwise search on youtube afterwards, there are masses of tutorials.

You have to start the server with this command:

java -Xmx1G -jar minecraft-server.jar

This starts with max 1GB, if you want more, you can simply replace the 1 by a different GB number. But also make sure that enough RAM is available.