Minecraft on Ubuntu

[Jojomatik]

Hi,

I'm running a ubuntu VM on my unraid machine in which I ran my minecraft server (papermc).

It is underperforming very badly (To a point where the folks in the papermc help chat just laughed at me ; only 2 to 4 players and very hard lags) even though one thread is fully used on the CPU (Ryzen 1600). It is running on 8GBs of ram.

This should all not be an issue from what I've read online. Running the same settings locally on my Ryzen 3600 Win 10 is not an issue at all (3% CPU usage).

Running 

sysbench --test=cpu --num-threads=1 run

I get an result of around 1500 which seems to be right. So the VM does not seem to hurt performance too much.

Is there anything obvious I could miss while creating the VM, that should be really obvoius?

Edit:
I've now tested running the server in a mineos docker, which works completely fine as expected.

Further testing of the JVM in ubuntu using a self coded single core prime-computation-benchmark in java revealed about 20% lower performance compared to my newer Ryzen 3600, which is ruffly what I would expect including the VM overhead. So the issue is propably somewhere in the combination of paper/minecraft server and the virtualization.

Edited December 24, 2020 by Jojomatik
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