Memory and GC Setup ‐ Prism Launcher, MultiMC, etc. - Vivecraft/VivecraftMod GitHub Wiki

To set the memory and garbage collector settings on Prism Launcher, MultiMC, and other forks, first click "Edit" on the desired instance and follow these steps:

1. Go to the "Settings" section
2. Set both the minimum and maximum memory allocation to the same value in MB, at least 6 GB is recommended for ZGC (1024 MB = 1 GB)
3. Add -XX:+UseZGC to the Java arguments