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Windows Internals, Fifth Edition by David A. Solomon Mark E. Russinovich and Alex Ionescu

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Introduction to the Memory Manager

By default, the virtual size of a process on 32-bit Windows is 2 GB. If the image is marked specifically as large address space aware, and the system is booted with a special option (described later in this chapter), a 32-bit process can grow to be 3 GB on 32-bit Windows and to 4 GB on 64-bit Windows. The process virtual address space size on 64-bit Windows is 7,152 GB on IA64 systems and 8,192 GB on x64 systems. (This value could be increased in future releases.)

As you saw in Chapter 2 (specifically in Table 2-3), the maximum amount of physical memory currently supported by Windows ranges from 2 GB to 2,048 GB, depending on which version and edition of Windows you are running. Because the virtual address space ...

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