Are forge 1.18.2 servers hard capped at 8GB?

[Electro-Hawk]

Whenever I try to set the user_jvm_args RAM max value anything higher than 8 it seems to drop down to below 5 actually being used (according to Task Manager anyway) according to the pc properties it should have 20GB of RAM so allocating 10 or so should be perfectly fine but it seems to just throttle itself down to roughly 4.

Link to relevant images: https://imgur.com/a/3O3yU8c

Am I doing something wrong or do I need something else to make it possible to increase the max amount of RAM available?

[warjort]

In java

-Xmx specifies the MAXMIMUM heap size

-Xms specifies the MINIMUM heap size

It won't allocate the maximum unless it needs it.

[Electro-Hawk]

19 hours ago, warjort said:

It won't allocate the maximum unless it needs it.

Problem is that when I had it set to 12GB it was locking itself at 4GB when it definitely needed more, server would take several seconds to catch up now and then when moving relatively small distances loading and unloading areas

[warjort]

Use something like the spark mod to get more information on what is going on.

https://www.curseforge.com/minecraft/mc-mods/spark

 

Or install the java development kit (JDK) instead of the java runtime environment (JRE) which will give you access to additional monitoring tools such as jconsole

https://docs.oracle.com/en/java/javase/17/management/using-jconsole.html