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01-17-2008, 06:49 AM
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 2 GB Memory Limit Hi all, i read that Linux enables a process to use 3 GB of user space memory. But on my (redhat 8.0, 2.4.18-14bigmem) box it seems impossible to use more than 2 GB. Have I forgot anything to set up my system to use the full 3 GB? Any help appreciated Helge PS demo program: #include <iostream> using namespace std; int main () { int ** dummy = new int * [8]; // this loop should run min. 5, maybe 6 times, but it doesn't: for (int i = 0; i < 8; i++) { cout << i+1 << "*512 MB "; dummy[i] = (int *)malloc (1024*1024*512); // alloc 512 MB if (dummy[i]) { dummy[i][1024*1024*127] = 0; // access mem cout << "ok" << endl; // success } else { cout << "failed!" << endl; return 0; } } return 0; } Its output is: 1*512 MB ok 2*512 MB ok 3*512 MB ok 4*512 MB ok 5*512 MB failed!      |
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