Crash- Java running out of memory

After a few minutes, the game will start running out of memory (and won't start properly if I replace in the parameters 1G with 2G).

Actually, it starts happening as soon as I log on to a server. This has happened many times over several days. This didn't happen when I was on my 11 year old computer, and only happened once I switched to a new computer.

 

Note: I have not attempted this on 1.13.2, however there was no option for Minecraft 1.8 or 1.8. This happened on 1.8.9