Memory Limits for Windows and Windows Server releases

Source: Internet
Author: User
Tags windows web server

Memory Limits for Windows and Windows Server releases
    • 2018/05/31
    • 9 min to read

Https://docs.microsoft.com/zh-cn/windows/desktop/Memory/memory-limits-for-windows-releases

This topic describes the memory limits for supported Windows and Windows Server releases.

  • Memory and Address Space Limits
  • Physical Memory Limits:windows 10
  • Physical Memory limits:windows Server 2016
  • Physical Memory Limits:windows 8
  • Physical Memory limits:windows Server 2012
  • Physical Memory Limits:windows 7
  • Physical Memory limits:windows Server R2
  • Physical Memory limits:windows Server 2008
  • Physical Memory limits:windows Vista
  • Physical Memory limits:windows Home Server
  • Physical Memory limits:windows Server 2003 R2
  • Physical Memory limits:windows Server 2003 with Service Pack 2 (SP2)
  • Physical Memory limits:windows Server 2003 with Service Pack 1 (SP1)
  • Physical Memory limits:windows Server 2003
  • Physical Memory limits:windows XP
  • Physical Memory limits:windows Embedded
  • How graphics cards and other devices affect memory limits
  • Related Topics

Limits on memory and address space vary by platform, operating system, and by whether the Image_file_large_address_aware V Alue of the loaded_image structure and 4-gigabyte tuning (4GT) is in use. Image_file_large_address_aware is set or cleared by using THE/LARGEADDRESSAWARE linker option.

4-gigabyte tuning (4GT), also known as application memory tuning, or THE/3GB switch, is a technology (only applicable to (+ bit systems) that alters the amount of virtual address space available to user mode applications. Enabling this technology reduces the overall size of the system virtual address space and therefore system resource Maximu Ms. For more information, see what is 4GT.

Limits on physical memory for 32-bit platforms also depend on the physical Address Extension (PAE), which allows 32-bit Wi Ndows systems to use more than 4 GB of physical memory.

Memory and Address Space Limits

The following table specifies the limits on memory and address space for supported releases of Windows. Unless otherwise noted, the limits in this table apply to all supported releases.

Memory Type Limit on X86 Limit in 64-bit Windows
User-mode virtual address space for each 32-bit process 2 GB
Up to 3 GB with Image_file_large_address_aware and 4GT
2 GB with image_file_large_address_awarecleared (default)
4 GB with Image_file_large_address_awareset
User-mode virtual address space for each 64-bit process Not applicable With Image_file_large_address_aware set (default):
X64:8 TB
Intel itanium-based systems:7 TB
Windows 8.1 and Windows Server r2:128 TB

2 GB with image_file_large_address_awarecleared
Kernel-mode Virtual address space 2 GB
From 1 GB to a maximum of 2 GB with 4GT
8 Tbwindows 8.1 and Windows Server r2:128 TB

Paged Pool 384 GB or system commit limit, whichever is smaller. windows 8.1 and Windows server 2012 r2:  ; 15.5 TB or system commit limit, whichever is smaller. 
Windows SERVER 2008 R2, windows 7, Windows Server 2008 and windows vista: limited by available Kernel-mode virtual address space. Starting with Windows vista with Service pack 1 (SP1), the paged pool can also is limited by the pagedpooll Imit registry key value.
Windows Home Server and Windows server 2003: 530 MB
windows xp: 490 MB

384 GB or system commit limit, whichever is smaller Windows 8.1 and Windows Server r2:15.5 TB or system commit limit , whichever is smaller.
Windows Server R2, Windows 7, Windows Server, and Windows vista:128 GB or system commit limit, whichever is smal Ler
Windows Server 2003 and Windows Xp:up to a GB depending on configuration and RAM.

Nonpaged Pool 75% of RAM or 2 GB, whichever is smaller. windows 8.1 and Windows Server 2012 r2: ram or T B, whichever is smaller (address space was limited to 2 x RAM).
windows vista: limited only by kernel mode virtual address space and physical memory. Starting with Windows vista with SP1, the nonpaged pool can also is limited by the nonpagedpoollimit regist Ry key value.
Windows Home Server, Windows server 2003 and windows xp: 256 MB, or MB with 4GT.

RAM or GB, whichever is smaller (address space was limited to 2 x RAM)  windows 8.1 and Windows Server&nbs P;2012 r2: ram or TB, whichever is smaller (address space was limited to 2 x RAM).
Windows SERVER 2008 R2, windows 7 and Windows server 2008: 75% of RAM up to a maximum of 128 GB
windows vista: 40% of RAM up to a maximum of GB.
Windows server 2003 and Windows xp: up to a GB depending on configuration and RAM.

System Cache virtual address space (physical size limited only by physical memory) Limited by available Kernel-mode virtual address space or the Systemcachelimitregistry key value.
Windows 8.1 and Windows Server r2:16 TB.
Windows vista:limited only by kernel mode virtual address space. Starting with Windows Vista with SP1, System cache virtual address space can also is limited by the Systemcachelimit Regis Try key value.
Windows Home Server, Windows Server 2003 and Windows xp:860 MB with LargeSystemCache registry key set and without 4GT; Up to 448 MB with 4GT.

Always 1 TB regardless of physical RAM Windows 8.1 and Windows Server, R2:16 TB.
Windows Server 2003 and Windows Xp:up to 1 TB depending on configuration and RAM.

Physical Memory Limits:windows 10

The following table specifies the limits on physical memory for Windows 10.

Version Limit on X86 Limit on X64
Windows Ten Enterprise 4 GB 2TB
Windows Ten Education 4 GB 2TB
Windows Ten Pro 4 GB 2TB
Windows Ten Home 4 GB 128GB

Physical Memory limits:windows Server 2016

The following table specifies the limits on physical memory for Windows Server 2016.

Version Limit on X64
Windows Server Datacenter TB
Windows Server Standard TB

Physical Memory Limits:windows 8

The following table specifies the limits on physical memory for Windows 8.

Version Limit on X86 Limit on X64
Windows 8 Enterprise 4 GB GB
Windows 8 Professional 4 GB GB
Windows 8 4 GB GB

Physical Memory limits:windows Server 2012

The following table specifies the limits on physical memory for Windows Server 2012. Windows Server available only in X64 editions.

Version Limit on X64
Windows Server Datacenter 4 TB
Windows Server Standard 4 TB
Windows Server Essentials GB
Windows Server Foundation Gb
Windows Storage Server Workgroup Gb
Windows Storage Server 4 TB
Hyper-V Server 2012 4 TB

Physical Memory Limits:windows 7

The following table specifies the limits on physical memory for Windows 7.

Version Limit on X86 Limit on X64
Windows 7 Ultimate 4 GB 192 GB
Windows 7 Enterprise 4 GB 192 GB
Windows 7 Professional 4 GB 192 GB
Windows 7 Home Premium 4 GB + GB
Windows 7 Home Basic 4 GB 8 GB
Windows 7 Starter 2 GB N/A

Physical Memory limits:windows Server R2

The following table specifies the limits on physical memory for Windows SERVER 2008 R2. Windows SERVER 2008 R2 is available only in 64-bit editions.

Version Limit on X64 Limit on IA64
Windows Server R2 Datacenter 2 TB
Windows Server R2 Enterprise 2 TB
Windows Server R2 for itanium-based Systems 2 TB
Windows Server R2 Foundation 8 GB
Windows Server R2 Standard Gb
Windows HPC Server R2 GB
Windows Web Server R2 Gb

Physical Memory limits:windows Server 2008

The following table specifies the limits on physical memory for Windows server 2008. Limits greater than 4 GB for 32-bit Windows assume That pae is enabled.

/tr>
Version limit on X86 limit on X64 limit on IA64
Windows server 2008 Datacenter GB 1 TB  
Windows server 2008 Enterprise GB 1 TB   ;
Windows server 2008 HPC Edition   -GB  
Windows server 2008 standard 4 GB GB  
Windows server 2008 for itanium-based Systems     2 TB
Windows Small business Server $ 4 GB GB  
Windows Web Server $ 4 GB GB  

Physical Memory limits:windows Vista

The following table specifies the limits on physical memory for Windows Vista.

Version Limit on X86 Limit on X64
Windows Vista Ultimate 4 GB GB
Windows Vista Enterprise 4 GB GB
Windows Vista Business 4 GB GB
Windows Vista Home Premium 4 GB + GB
Windows Vista Home Basic 4 GB 8 GB
Windows Vista Starter 1 GB

Physical Memory limits:windows Home Server

Windows Home Server is available only in a 32-bit edition. The physical memory limit is 4 GB.

Physical Memory limits:windows Server 2003 R2

The following table specifies the limits on physical memory for Windows Server 2003 R2. Limits over 4 GB for 32-bit Windows assume this PAE is enabled.

Version Limit on X86 Limit on X64
Windows Server 2003 R2 Datacenter Edition GB
(GB with 4GT)
1 TB
Windows Server 2003 R2 Enterprise Edition GB
(GB with 4GT)
1 TB
Windows Server 2003 R2 Standard Edition 4 GB Gb

Physical Memory limits:windows Server 2003 with Service Pack 2 (SP2)

The following table specifies the limits on physical memory for Windows Server 2003 with Service Pack 2 (SP2). Limits over 4 GB for 32-bit Windows assume this PAE is enabled.

Version Limit on X86 Limit on X64 Limit on IA64
Windows Server 2003 with Service Pack 2 (SP2), Datacenter Edition GB
(GB with 4GT)
1 TB 2 TB
Windows Server 2003 with Service Pack 2 (SP2), Enterprise Edition GB
(GB with 4GT)
1 TB 2 TB
Windows Server 2003 with Service Pack 2 (SP2), Standard Edition 4 GB Gb

Physical Memory limits:windows Server 2003 with Service Pack 1 (SP1)

The following table specifies the limits on physical memory for Windows Server 2003 with Service Pack 1 (SP1). Limits over 4 GB for 32-bit Windows assume this PAE is enabled.

Version Limit on X86 Limit on X64 Limit on IA64
Windows Server 2003 with Service Pack 1 (SP1), Datacenter Edition GB
(GB with 4GT)
X64 1 TB 1 TB
Windows Server 2003 with Service Pack 1 (SP1), Enterprise Edition GB
(GB with 4GT)
X64 1 TB 1 TB
Windows Server 2003 with Service Pack 1 (SP1), Standard Edition 4 GB Gb

Physical Memory limits:windows Server 2003

The following table specifies the limits on physical memory for Windows Server 2003. Limits over 4 GB for 32-bit Windows assume this PAE is enabled.

Version Limit on X86 Limit on IA64
Windows Server 2003, Datacenter Edition GB
(GB with 4GT)
GB
Windows Server 2003, Enterprise Edition GB
(GB with 4GT)
GB
Windows Server 2003, Standard Edition 4 GB
Windows Server 2003, Web Edition 2 GB
Windows Small Business Server 2003 4 GB
Windows Compute Cluster Server 2003 Gb
Windows Storage Server 2003, Enterprise Edition 8 GB
Windows Storage Server 2003 4 GB

Physical Memory limits:windows XP

The following table specifies the limits on physical memory for Windows XP.

Version Limit on X86 Limit on X64 Limit on IA64
Windows XP 4 GB GB GB (not supported)
Windows XP Starter Edition Mb N/A N/A

Physical Memory limits:windows Embedded

The following table specifies the limits on physical memory for Windows Embedded.

Version Limit on X86 Limit on X64
Windows XP Embedded 4 GB
Windows Embedded Standard 2009 4 GB
Windows Embedded Standard 7 4 GB 192 GB

How graphics cards and other devices affect memory limits

Devices has to map their memory below 4 GB for compatibility with Non-pae-aware Windows releases. Therefore, if the system has 4GB of RAM, some of it are either disabled or is remapped above 4GB by the BIOS. If the memory is remapped, X64 Windows can use this memory. X86 client versions of Windows don ' t support physical memory above the 4GB mark, so they can ' t access these remapped regio Ns. Any X64 Windows or X86 Server release can.

X86 client versions with PAE enabled does have a usable 37-bit (GB) Physical address space. The limit that these versions impose are the highest permitted physical RAM address, not the size of the IO space. That means Pae-aware drivers can actually use physical space above 4 GB if they want. For example, drivers could maps the "lost" memory regions located above 4 GB and expose this memory as a RAM disk.

Memory Limits for Windows and Windows Server releases

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.