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I'm running my program from eclipse and using 64-bit java, but I still can't get it to allocate more than 2GB of memory. I'm running some benchmarks so I need a lot of memory.
I have this in my eclipse.ini: -Xmx8g
I want it to use all my memory. Could this be due to a 32-bit version of eclipse? I'm not sure what I have for eclipse.
I've tried sending in -Xmx8g to VMArgs when running the program. I'm running 64-bit windows 7 and a 64-bit JRE.
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For 64 bit platforms and Java stacks in general, the recommended Maximum Heap range for WebSphere Application Server, would be between (4096M - 8192M) or (4G - 8G).
The theoretical limit is 2^64 bytes, which is 16 exabytes (1 exabyte = 1024 petabytes, 1 petabyte = 1024 terabytes). However, most OS's can't handle that. For instance, Linux can only support 64 terabytes of data. Note: We don't recommend you exceed 2 GB of in use JVM heap.
The short answer Use -Xmx to specify the maximum heap size. Use -Xms to specify the initial Java heap size. Use -Xss to set the Java thread stack size.
In the run configuration screen, go to Arguments tab, add -Xmx8g to the VM arguments text box.
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