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Message: [QUOTE="Momo, post: 2917236"] Hi, Something was puzzling me about when I will run out of memory. I have a simple program, that does nothing but take size as the input, and then allocates a boolean array with x=new boolean[size]. I throw an OutOfMemoryError when size is greater than about 6*10^7. If I then change the program to allocate a boolean array with y=new boolean[size][4], I get the Error when size is greater than about 3*10^6. I would have thought that double-scripting the array to be length 4, I would make the maximum value of size roughly 1/4th as large. But instead it changes by a factor of 20. Why such a big change? This is not an actual problem for me, since I just increased the size of the java heap space. But I'd like to understand where the factor of 20 comes from. Momo [/QUOTE]