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  1. Minecraft: Java Edition
  2. MC-168633

Villager AI causes immense lag (adds up with large village populations) - does not happen in 1.14.4

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    Details

    • Type: Bug
    • Status: Reopened
    • Resolution: Unresolved
    • Affects Version/s: 1.15.1
    • Fix Version/s: None
    • Labels:
      None
    • Environment:
      Windows 10
      java version "1.8.0_45"
      Java(TM) SE Runtime Environment (build 1.8.0_45-b15)
      Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)
    • Confirmation Status:
      Confirmed
    • Category:
      Performance
    • Mojang Priority:
      Important

      Description

      The server is crashing often - on the order of minutes.  It also is taking a very long time to execute some operations like eating, smelting, and brewing.

       

      This is happening in a chunk that has a great deal of redstone and a great many villagers and animals.  The server seems stable away from this chunk.

       

      This world was stable with very little lag in 1.14.4.  I have uploaded the world in its current state as well as its last state in 1.14.4.  Link provided below.  I have also uploaded a screenshot of the server system specs to the same location.

       

      I am currently running the client from the same machine as the server.

       

      Additional notes that may be useful:

      • Animals and villagers move in short steps with pauses instead of smoothly.
      • Golems in lava take a very long time to die, with each sound occurring with a long pause in between.
      • I reached an impasse trying to brew a potion.  The server crashes before the slow operation can complete.  Then, when the server restores, the blaze rod is used but the potion brewing starts over.
      • CPU utilization seems fine.  Uploaded screenshot.

       

      Link to worlds and specs:

      https://drive.google.com/drive/folders/1eReWDHUW6xnNoHbHDpOvRfxoYEjmPQHM?usp=sharing

       

       

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            Assignee:
            Unassigned Unassigned
            Reporter:
            dananarama Dan Busenbarrick
            Votes:
            6 Vote for this issue
            Watchers:
            5 Start watching this issue

              Dates

              Created:
              Updated:
              CHK: