If you run a Project Zomboid dedicated server for your friends, using Zulu Platform x64 is highly recommended. Servers do not need to render graphics, meaning their performance relies entirely on CPU calculations and RAM management.

-XX:+UseG1GC : Enables the Garbage-First Garbage Collector, which reduces stuttering.

-XX:G1HeapRegionSize=16M \ -XX:InitiatingHeapOccupancyPercent=30 \ -XX:G1ReservePercent=15 \ -XX:+UseStringDeduplication

How to Install and Configure Zulu Platform x64 for Project Zomboid