JVM 64 uses a maximum of 2 GB on Windows Server 2012 on Azure

Question

I am using a Windows 2012 server with 7 GB of RAM, which is located on Azure. I installed 64-bit Java on the machine.

When starting jvm, I set the maximum compression level to 4 GB using the argument

-Xmx6g

However, when I run my jar, it encounters an exception from OutOfMemory. I checked the task manager during its operation, and it shows that the memory used for the process reaches a maximum of about 2 GB and never passes by. This is despite the fact that I install heapsize up to 6GB.

On my local PC, where I use a Windows 7 machine with 8 GB of RAM, I do not encounter this problem.

I used the following commands in my java application

System.out.println(System.getProperty("sun.arch.data.model"));
System.out.println("Max Memory: " + Runtime.getRuntime().maxMemory());

And that gives me the following:

Windows Server 2012

64
1670381568

Local pc

64
6681001984

Windows Server JVM? - , ?

Answer 1

, .

, java.

.

java -jar "myapp.jar" "myArgs" -Xmx6g 

java -Xmx6g -jar "myapp.jar" "myArgs"

Answer 2

-Xmx .

:

• -Xmx4096m.
• Azure, , /. ? (: http://msdn.microsoft.com/en-us/library/aa384372(VS.85).aspx, http://social.technet.microsoft.com/Forums/en-US/2ba92acf-e1b9-4a3e-8ae7-f8ac31723959/problem-with-running-java-application-into-a-win-vm-of-azure-by-using-powershell-remoting?forum=WAVirtualMachinesforWindows)
• , Java ? ( , Java JRE Azure?)

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