Configuration with Minecraft - Minecraft low CPU usage

System Information

Field Value
Operating System Windows - Windows 10 Pro on x86_64
Product AMP ‘Decadeus’ v2.4.6.4 (Mainline)
Virtualization None
Application Minecraft
Module MinecraftModule
Running in Container No
Current State Sleeping

Problem Description


In the metrics and status panel it shows that its often 50 to 100+ percent cpu Usage but when I open task manager it show that is less than 10%. this causes the world generation to be very slow. I have tried different settings but nothing seems to help with this cpu usage

Reproduction Steps

  • Create Minecraft instance
  • Select paper jar version 1.20.1

You were looking at a single-core calculation, AMP uses a multi-core calculation. (if you do the math, it’s the same)
Minecraft is slow when it comes to generating terrain, given that most of the game is single-threaded. It’s gotten worse since 1.18 and there isn’t a way around it besides pregenerating the terrain (the tradeoff being spending CPU now to use less later).
Just one of the fun things with MC server management.

Allright thank you very much. I know that it has gotten worse in the last couple versions but I did’t realize that it was this bad

Yeah, Paper is your best bet for working with plugins though, so you’re on track in that regard.
I run all my servers on some old CPUs, so it’s starting to show now and then. If you have the space, pregenerating is pretty solid, otherwise I’d recommend just keeping the render distance around 10.
Hopefully as we get newer releases of MC they’ll fix some of the performance issues.

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