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  1. Minecraft (Bedrock codebase)
  2. MCPE-149685

High CPU usage after 1.18 upgrade


    • Icon: Bug Bug
    • Resolution: Duplicate
    • None
    • 1.18.0
    • None
    • Survival
    • Unconfirmed
    • Windows

      After updating the server to software version CPU usage went through the roof when any player is logged in. It used to run 4 players simultaneously but now even with one player logged in it takes 99% of processor power (1 core only, it's on shared hosting). 

      If I log in server usage is at 99% for a minute or two, then if I don't do anything it goes down to 70% and hovers around there. As I start mining etc. it goes up to 99% and blocks stop breaking. Reducing render distance to 12 (from 32 on 1.17.x) and tick distance to 6 (From 12 on 1.17.x) helped a bit - single-player login still takes the CPU to 99%, then after a minute, it drops to 30% on idle. When starting to play it climbs to about 70% and hovers around 60-90% with lag appearing very rarely. However, when the second player logged in it very quickly went to 99% and basically hung the server. Cant even shut it down.


      The server is on Ubuntu 20.04, server version Players connect from windows clients.


      Moving the world to a local machine and running it there does not produce higher than usual processor loads. 


      Please advise.



            JamsonStar Jamson
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