Memory usage - Virtual Bytes

Question

Hello!

Today got puzzled a bit by running this command on one of my HV servers:

Get-Process |
Format-Table Name,
@{n='VM(MB)';e={$_.VM / 1MB -as [int]}} -autosize

Am getting it right that on the system with 20GB of virtual memory this command returns the VM size =~2TB???

Regards,
Michael

Answer 1

Hi there,

This is right in accordance with the Process Virtual Memory Concept.

Processes are not aware of physical hardware. Each process is given its own, private, virtual address space which is a finite amount of virtual memory

Each process has a finite amount of virtual address space that it cannot exceed. The amount of virtual memory per process depends on if it was compiled as 32-bit or 64-bit. x86 is the 32-bit implementation of Windows. x64 is the current 64-bit implementation of Windows.

For example, 64-bit processes have 8 TB of virtual address space.

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Answer 2

I'm guessing that you "don't understand it/can't find the explanation" because you haven't looked for one. A search for "windows server default allocation size of 64-bit process virtual memory" finds these two links (and more):

virtual-address-space
memory-limits-for-windows-releases

Answer 3

You're guessing wrong: information about the memory limits is not the answer to my question.

Thank you once again,
Michael