How much memory should you be able to allocate?

Question

Background: I am writing a C++ program working with large amounts of geodata, and wish to load large chunks to process at a single go. I am constrained to working with an a

Answer 1

With nBandBytes at 466,560,000, you are trying to allocate 1.4 GB. A 32-bit app typically only has access to 2 GB of memory (more if you boot with /3GB and the executable is marked as large address space aware). You may be hard pressed to find that many blocks of contiguous address space for your large chunks of memory.

If you want to allocate gigabytes of memory on a 64-bit OS, use a 64-bit process.