Im running a Minecraft Server and somehow it is struggling with timing. - So its laggy, sometimes more, sometimes less. So I probably figured out that this is a problem caused by my CPU, since its running on 2,7GHz. (Also the RAM is on 48GB and never used more than 40%). As far as I know I have 8 cores, and im sure Minecraft uses just one.. So is there any Option - maybe in the start script - to use more cores, so I can run a more stable Server?

The Server runs on a Debian10 vServer.

2 Answers 2


Minecraft servers currently only run off of one thread; every instruction is ran in sequence very quickly, rather than at the same time.

There's an experimental Forge mod that does allow for some multithreading called MCMT (specifically the multithreading of ticks), but it's relatively unstable and might not be what you're looking for.

  • Almost correct - Minecraft defers lighting and some other non-time-critical tasks to a separate thread, but it's true the bulk of the processing is single-thread and as such, single-CPU.
    – SF.
    Mar 23, 2021 at 15:47

The things I can list off of my head could be that:

  1. You have somehow set up the server wrong

  2. You have to many players on your server

  3. You have to many plugins or a world gen plugin

  4. A mod might not be compatible with another and is lagging the server

That's all I can think of, please tell me what other things the server has on it so I can better assist the situation (ex: plugins, mods, players, hosting).

  • Im not 100% sure, but im pretty sure that the setup is fine. the lags start even if there are only 5 player. round about 35 Plugins, but the timings output didn't show any issues with those. Mar 25, 2021 at 10:07
  • Well then I don't understand how there could be an issue.
    – Crazed
    Mar 25, 2021 at 12:47

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