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  1. Minecraft: Java Edition
  2. MC-275190

1.21 issues with memory dump and fps lowering with time

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    • Icon: Bug Bug
    • Resolution: Invalid
    • None
    • 1.21.1
    • None
    • Unconfirmed
    • (Unassigned)

      I am trying to play a modded pack on 1.21.1, and I'm getting very weird fps issues. Each memory dump has terrible fps drops, but worse than that, when I join the server I get 240 fps, and then over about 5 minutes it will drop to 80, and then after another 10 or so minutes it will be around 30fps. Doesn't make sense to me. I can run 1.20 modpacks with 500+ mods at 3–400 fps. 13700k + 6700xt 32gb of ram. I have 10 GB allocated, but I've tried allocating 4 and 18 GB and there was no change. Other friends have no issues with this modpack. The only thing I can think of is I have Java 21 installed to run the server we are playing on. (my CPU, GPU, and RAM usage are not the issue, CPU usage sits around 20%, GPU around 20 as well, and RAM around 60% with both the server and modpack running.) This issue happens even when the server is off, and I'm in single-player.

            Unassigned Unassigned
            themtwitchsweg themtwitchsweg
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