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  1. Minecraft: Java Edition
  2. MC-76376

Memory Leak and Tick speed

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    • Icon: Bug Bug
    • Resolution: Incomplete
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    • Minecraft 1.8, Minecraft 1.8.1, Minecraft 1.8.2-pre1
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    • Unconfirmed

      This spams the console with only one player on the server. While standing at spawn I do not seem to have this spam the console, but as I venture further out through the map this starts to spam the console (Slight variant each time). This is in debug mode, but I am assuming this causes the lag spikes (Warning cannot keep up with server error)

      Here is a link to what seems to be others with the exact same issue

      http://www.minecraftforum.net/forums/support/server-support/2205991-1-8-server-crashing-skipping-ticks

      [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? 

      [06:37:18] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick.tickBlocks.tickChunk.recheckGaps' took aprox 100.977362 ms
[06:37:18] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick.tickBlocks.tickChunk' took aprox 106.730703 ms
[06:37:18] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick.tickBlocks' took aprox 112.091694 ms
[06:37:18] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick' took aprox 118.255128 ms
[06:37:18] [Server thread/WARN]: Something's taking too long! 'root.levels.world' took aprox 118.608247 ms
[06:37:18] [Server thread/WARN]: Something's taking too long! 'root.levels' took aprox 118.967678 ms
[06:37:18] [Server thread/WARN]: Something's taking too long! 'root' took aprox 119.504795 ms
[06:37:25] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick.mobSpawner' took aprox 422.627479 ms
[06:37:26] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick.tickBlocks.tickChunk.recheckGaps' took aprox 101.630706 ms
[06:37:26] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick.tickBlocks.tickChunk' took aprox 117.091154 ms
[06:37:26] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick.tickBlocks.tickChunk.recheckGaps' took aprox 109.624471 ms
[06:37:26] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick.tickBlocks.tickChunk' took aprox 111.382491 ms
[06:37:26] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick.tickBlocks.tickChunk.recheckGaps' took aprox 101.790449 ms
[06:37:26] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick.tickBlocks.tickChunk' took aprox 103.417843 ms
[06:37:26] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick.tickBlocks' took aprox 433.979968 ms
[06:37:26] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick' took aprox 864.156385 ms
[06:37:26] [Server thread/WARN]: Something's taking too long! 'root.levels.world' took aprox 864.606252 ms
[06:37:26] [Server thread/WARN]: Something's taking too long! 'root.levels' took aprox 864.983491 ms
[06:37:26] [Server thread/WARN]: Something's taking too long! 'root' took aprox 865.373127 ms
[06:37:44] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick.mobSpawner' took aprox 141.52976 ms
[06:37:44] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick' took aprox 158.067112 ms
[06:37:44] [Server thread/WARN]: Something's taking too long! 'root.levels.world' took aprox 158.633533 ms
[06:37:44] [Server thread/WARN]: Something's taking too long! 'root.levels' took aprox 158.985849 ms
[06:37:44] [Server thread/WARN]: Something's taking too long! 'root' took aprox 159.337368 ms
[06:37:44] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick' took aprox 102.116817 ms
[06:37:44] [Server thread/WARN]: Something's taking too long! 'root.levels.world' took aprox 102.741317 ms
[06:37:44] [Server thread/WARN]: Something's taking too long! 'root.levels' took aprox 103.067681 ms
[06:37:44] [Server thread/WARN]: Something's taking too long! 'root' took aprox 103.558964 ms
[06:37:59] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick.mobSpawner' took aprox 316.884846 ms
[06:37:59] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick' took aprox 329.813771 ms
[06:37:59] [Server thread/WARN]: Something's taking too long! 'root.levels.world' took aprox 330.224033 ms
[06:37:59] [Server thread/WARN]: Something's taking too long! 'root.levels' took aprox 330.474154 ms
[06:37:59] [Server thread/WARN]: Something's taking too long! 'root' took aprox 330.856069 ms
[06:38:28] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick.mobSpawner.recheckGaps' took aprox 105.1787 ms
[06:38:28] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick.mobSpawner.recheckGaps' took aprox 108.504752 ms
[06:38:28] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick.mobSpawner' took aprox 247.54337 ms
[06:38:28] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick' took aprox 255.724714 ms
[06:38:28] [Server thread/WARN]: Something's taking too long! 'root.levels.world' took aprox 256.029966 ms
[06:38:28] [Server thread/WARN]: Something's taking too long! 'root.levels' took aprox 256.259085 ms
[06:38:28] [Server thread/WARN]: Something's taking too long! 'root' took aprox 256.69035 ms
[06:38:28] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick.mobSpawner' took aprox 303.470289 ms
[06:38:28] [Server thread/WARN]: Something's taking too long! 'root.levels.world.tick' took aprox 313.382704 ms
[06:38:28] [Server thread/WARN]: Something's taking too long! 'root.levels.world' took aprox 313.836947 ms
[06:38:28] [Server thread/WARN]: Something's taking too long! 'root.levels' took aprox 314.218438 ms
[06:38:28] [Server thread/WARN]: Something's taking too long! 'root' took aprox 314.940271 ms

      Less Important/Unimportant

      I have tried multiple different flags, no flags, adjusting memory, etc..... What is suggested? just -server? 

      java -server -Xmx3596M -Xms3596M -jar server.jar nogui

java -server -Xmx3596M -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+DisableExplicitGC -XX:+AggressiveOpts -jar server.jar nogui

java -Xms4092 -Xmx4092 -XX:+UseParallelOldGC -server -jar server.jar nogui

      I also have used the suggested script at http://minecraft.gamepedia.com/Tutorials/Server_startup_script which looks something like (with the variable adjusted multiple times of course...):

      java -Xmx${MAXHEAP}M -Xms${MINHEAP}M -XX:+UseConcMarkSweepGC \
 -XX:+CMSIncrementalPacing -XX:ParallelGCThreads=$CPU_COUNT -XX:+AggressiveOpts \
 -jar $SERVICE $OPTIONS

      I have used multiple suggested JVM flags but with little or no change. (Most of them made the server less stable) I also have adjusted the Memory heap by lowering it just to make sure there is some overhead for other applications running (However I do have 500MB of swap just in case, though I am like99% sure that probably is a bad idea, I have since turned it off and on but do not think that the server every has needed to use it or attempted to, though I am not a professional!)

      I thought perhaps it is the size of the map that may be causing this, but I would assume this shouldn't be the case... (I have no done testing on a server with a limited boarder other than the default)

      I have also been told that building above the nether may cause the lag, but have not spent time in MCEdit looking to see if anyone has done so.

            Unassigned Unassigned
            Centural Andrew
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              Created:
              Updated:
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