Astute users of Microsoft 32-bit Windows may have noticed that Blender is never allowed to use more than 1.5 GB of memory. As Blender can often consume a lot of memory, this can be a severe limitation at times. In this short tutorial, user mpan3 explains what causes the issue, and how to correct it.
It may not surprise you to learn that the bug is not the fault of Blender, but of Windows. Apparently Windows is designed to not allow programs to use any more than 1.5 GB of memory. mpan3's tutorial walks the user through a simple configuration file edit which tells Windows to allow applications to use more RAM.