Increase Memory in Matlab?

Hello,

I get some out of memory error when I am loading Matfiles (~20,000) from a folder to Matlab.

The error is:

Exception in thread "Thread-31" java.lang.OutOfMemoryError: GC overhead limit exceeded at java.lang.String.substring(Unknown Source)

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When I run the command, memory:

Maximum possible array: 39487 MB (4.140e+010 bytes) *

Memory available for all arrays: 39487 MB (4.140e+010 bytes) *

Memory used by MATLAB: 667 MB (6.992e+008 bytes)

Physical Memory (RAM): 24574 MB (2.577e+010 bytes)

Limited by System Memory (physical + swap file) available.

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I would like to know if I increase the memory available to Matlab, would this fix the problem? Is it recommendable ? If yes, how?

I am running a Windows 7 64 bit.

Thanks a lot in advance.

Cheers,

Answer 1

[Walter Roberson]

The problem appears to be in the memory allocated for java, rather than for MATLAB itself. There have been a few questions about how to increase the java memory, but I do not recall the exact solution at the moment; I think it involved the java.opts file.

[Nitin]

Yes, it was a java memory allocation issue.

Increasing the size of the Java Heap Memory fixed the problem.

This link http://blogs.mathworks.com/community/2010/04/26/controlling-the-java-heap-size/ explains how this can be done.

Thanks.

[Walter Roberson]

Thanks for finding the link and posting it!

Answer 2

[Andreas Goser]

I suggest that you focus on reducing the amout of data, not increasing the memory. It depends on your application, but maybe you do not have to have all 20000 files in memory to do your task.