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  1. #1
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    Default get maximum heap size that can be allocated

    Hi

    is there a way by which i can progmatically find the current maximum amount of system heap memory that can be allocated by a JVM.

    Or if i am writing a simple java code and want to know what's the current SYSTEM max heap memory,


    Thanks

  2. #2
    r035198x is offline Senior Member
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    Default

    What do you mean by system heap memory?
    The heap is used by your java application not by your OS.

  3. #3
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    what i meant was... for eg.

    if i run

    java -Xms64m -Xmx512m -jar xyz.jar (it runs)

    else

    java -Xms64m -Xmx2000m -jar xyz.jar (it fails, sayin "Failed to instantiate heap. 2000M requested. Could not create the Java virtual machine.)

    is there a way by which i can progmatically know the maximum heap that can be allocated.
    Last edited by gautam.aditya97; 03-30-2010 at 08:29 AM.

  4. #4
    amp88 is offline Member
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    Default

    The Runtime class provides some information on this. See here for a bit more information on Runtime and other ways to assess memory usage more accurately.

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