This RAM issue it's not related to GTXGaming services, it's due to the Garbage Collector that Zomboid it's using.
Zomboid uses the Z Garbage Collector (ZGC) by default on Windows 10 systems (Win 2019/2022) and the G1 Garbage Collector by default on Windows 7 (Win 2006) systems, the ZGC uses 60% more RAM (exponentially) than the G1GC, since GTXGaming mainly uses Windows 2019/2022 machines Zomboid selects ZGC by default, making the RAM usage skyrocket!
If server provider X it's using less RAM than server provider Y for the exact same server setup, it's because they are using Windows 2006 or older or forcing G1GC by default on their servers. (Some server providers use Linux machines, not sure what Linux systems use by default, RAM and Garbage Collector wise to compare with Windows).
- ZGC Usage
- G1GC Usage
- Memory usage between GTXGaming Game Panel / Windows Java.exe process Working set memory and Zomboid Admin Panel Statistics.
With this being said, if you have a GTXGaming server and your RAM usage it's too high, give it a go on G1GC, with your server stopped, enable it from inside the Start.bat side.
Enjoy!