[WARNING] Can't keep up! Did the system time change, or is the server overloaded?

Discussion in 'Bukkit Help' started by Monty70 - GameTeam.cz, Apr 28, 2011.

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  1. Hi.

    Please help me.

    I have server MineCraft.

    CPU - Intel Core i5-760 (Quad-Core 2,80GHz)
    RAM - 4x Kingstone 4GB DDR3 1333MHz (16 GB)
    HDD - 2x SATA2 500GB 7200 RPM
    OS - Windows server 2008 R2 64bit
    Java - java version 1.7.0-ea (build 1.7.0-ea-b125) 64-bit

    Me before we ran the server MineCraft 1.4_02 - Bukkit 617 and everything was great.
    60 players on-line and no lag, everything was fine.

    Now we switched to MineCraft 1.5 - Bukkit 733 I had the same settings, I just updated plugins. When 15 people online have a problem.

    [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
    The server slows down time, the monsters move jerkily.
    Please help.

    Try my server .
    Czech republik

    @echo off
    "C:\Program Files\Java\jre7\bin\Minecrat_server_1.4.exe" -cp -server -Xmn1536M
    -Xmx6144M -Xms3072M -XX:+UseConcMarkSweepGC -XX:+DisableExplicitGC
    -XX:+UseAdaptiveGCBoundary -XX:MaxGCPauseMillis=500 -XX:-UseGCOverheadLimit
    -XX:SurvivorRatio=16 -Xnoclassgc -XX:UseSSE=3 -XX:ParallelGCThreads=4
    -jar craftbukkit-617.jar

    40 Plugins in server 
    World - 163 MB
    World2 - 84 MB
    World3 - 32 MB
    World4 - 5,5 MB
    World5 - 43 MB
    Sorry my bad english.
  2. I created a RAM disk on the server and I moved into a folder server and Javacomponent.

    Problem unsolved.
    The problem with time - look at our server onlinemapu and check up on time. That's my problem, an unstable time.

    Please help.
  3. Offline


    Hi, I also have the most problem with the load, tell me please how to decide. Thank you.
  4. Offline


    I have the same problem with time =(
    Somebody help plz!

  5. Offline


    Please help to solve the problem..
  6. Offline


    at first use a cleaner launcher please. Try this one
    SET BINDIR=%~dp0
    CD /D "%BINDIR%"
    "%ProgramFiles%\Java\jre6\bin\java.exe" -Xincgc -Xmx1G -jar craftbukkit-0.0.1-SNAPSHOT.jar
    costumize ram amount and craftbukkit.jar name if needed and change jre6 to jre7
  7. This is what I tried first. It did not help
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    No need to write that big.
  9. Offline


    Free up your RAM. If that doesn't work you need to do one of three things:
    1) Lower the useage of RAM that your server uses
    2) Increase the amount of RAM on your system.
    3) Decrease the amount of plugins on your system

    Plugins use RAM, therefore decreasing plugins should speed up the system.

    Additionally: If your on a VPS or VDS you don't have dedicated hardware and share your hardware with other users. If that's the case your not going to get around this issue unless you get dedicated hardware. (this is directed at @Dyshegyb and @pomo4ka since @Monty70 - GameTeam.cz posted his system specifications.)

    EDIT: @Monty70 - GameTeam.cz you are going to want to run the craftbukkit.jar file rather than a .exe file.
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    Firstly, why are you using Java 1.7?
    Secondly, if Java 1.6 doesn't work then something is incorrectly reporting CPU frequency and running at the wrong speed (I suspect the beta Java you're using).
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    Ram is not the issue here (notice he has 16GB and it isn't spamming/crashing about low memory and his task manager is only using 5/16GB), its because CraftBukkit only uses a single thread and all of the plugins have to run in that thread, and with 40 plugins running that is possibly a lot of processing trying to happen in a 50ms server tick

    Honestly, try to find a safe OC for the cpu and see if that helps mitigate the problem, also i would try removing all plugins and adding them one at a time to see which one is using the most resources
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    @mindless728 - just to keep me at ease, why does he have three references to memory and is it a problem he's running a .exe for a server?
  13. Offline


    He's using a different version of java, so he has to specify the path to the java.exe. He simply named that java.exe to Minecrat_server_1.4.exe for some reason.
  14. I testing befor write this forum.

    Lower RAM ->1Gb - Problem unsolved
    Delete all plugins in server - Problem unsolved

    I do not have VPS server i have private server with configurations:

    CPU - Intel Core i5-760 (Quad-Core 2,80GHz)
    RAM - 4x Kingstone 4GB DDR3 1333MHz (16 GB)
    HDD - 2x SATA2 500GB 7200 RPM
    OS - Windows server 2008 R2 64bit

    This server has 16 GB RAM - Deficiency RAM is not a problem

    Java 7:
    I tried to reinstal the version of Java 1.6.0_25 - problen unsolved
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