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- Address_Windowing_Extensions abstract "Address Windowing Extensions (AWE) is a Microsoft Windows application programming interface that allows a 32-bit software application to access more physical memory than it has virtual address space, even in excess of the 4 GB limit. The process of mapping an application's virtual address space to physical memory under AWE is known as "windowing," and is similar to the overlay concept of other environments. AWE is beneficial to certain data-intensive applications, such as database management systems and scientific and engineering software, that need to manipulate very large data sets.The application reserves a region, or "window" of virtual address space, and allocates one or more regions of physical memory. Using the AWE API, the application can map the virtual window to any one of the physical regions. The application can reserve more than one virtual address space and map it to any of the allocated regions of physical memory, as long as the number of bytes reserved in the virtual address space matches that of the physical memory region. An application must have the Lock Pages in Memory privilege to use AWE.AWE depends on Physical Address Extension support when reserving memory above 4 GB. AWE was first introduced in Windows 2000 as a new API superseding the PSE36 method (from the Windows NT 4.0 Enterprise Edition) of accessing more than 4 GB of memory, which was no longer supported in Windows 2000. Among the first applications to make use of AWE were Oracle 8.1.6 and Microsoft SQL Server 2000.If the /3GB boot flag is used to repartition the 32-bit virtual address space (from the 2 GB kernel and 2 GB userland) to 3 GB userland, then AWE is limited to accessing 16 GB of physical memory. This limitation is because with only one GB reserved for the kernel, there isn't enough memory for the page table entries to map more than 16 GB of memory. Additional restrictions on the maximum amount of memory addressable thorough AWE are imposed by the Windows licensing scheme. For example Windows 2000 Advanced Server was limited to 8 GB, while Windows 2000 Data Center Server supported 64 GB.An article published in Dr. Dobb's Journal in 2004 noted that memory allocated using Address Windowing Extensions will not be written to the pagefile, and suggested that AWE regions could therefore be used as a way of protecting sensitive application data such as encryption keys.".
- Address_Windowing_Extensions wikiPageExternalLink aa366527.aspx.
- Address_Windowing_Extensions wikiPageExternalLink aa366531.aspx.
- Address_Windowing_Extensions wikiPageID "7525516".
- Address_Windowing_Extensions wikiPageLength "5099".
- Address_Windowing_Extensions wikiPageOutDegree "26".
- Address_Windowing_Extensions wikiPageRevisionID "676621695".
- Address_Windowing_Extensions wikiPageWikiLink Application_programming_interface.
- Address_Windowing_Extensions wikiPageWikiLink Application_software.
- Address_Windowing_Extensions wikiPageWikiLink Category:Microsoft_application_programming_interfaces.
- Address_Windowing_Extensions wikiPageWikiLink Category:Windows_NT_architecture.
- Address_Windowing_Extensions wikiPageWikiLink Category:X86_memory_management.
- Address_Windowing_Extensions wikiPageWikiLink Computer_programming.
- Address_Windowing_Extensions wikiPageWikiLink Data.
- Address_Windowing_Extensions wikiPageWikiLink Data_set.
- Address_Windowing_Extensions wikiPageWikiLink Database.
- Address_Windowing_Extensions wikiPageWikiLink Dr._Dobbs_Journal.
- Address_Windowing_Extensions wikiPageWikiLink Engineering.
- Address_Windowing_Extensions wikiPageWikiLink Expanded_Memory_Specification.
- Address_Windowing_Extensions wikiPageWikiLink Expanded_memory.
- Address_Windowing_Extensions wikiPageWikiLink MSDN.
- Address_Windowing_Extensions wikiPageWikiLink Microsoft_Developer_Network.
- Address_Windowing_Extensions wikiPageWikiLink Microsoft_SQL_Server.
- Address_Windowing_Extensions wikiPageWikiLink Microsoft_Windows.
- Address_Windowing_Extensions wikiPageWikiLink Oracle_Database.
- Address_Windowing_Extensions wikiPageWikiLink Overlay_(programming).
- Address_Windowing_Extensions wikiPageWikiLink PSE-36.
- Address_Windowing_Extensions wikiPageWikiLink PSE36.
- Address_Windowing_Extensions wikiPageWikiLink Pagefile.
- Address_Windowing_Extensions wikiPageWikiLink Paging.
- Address_Windowing_Extensions wikiPageWikiLink Physical_Address_Extension.
- Address_Windowing_Extensions wikiPageWikiLink Random-access_memory.
- Address_Windowing_Extensions wikiPageWikiLink Random_access_memory.
- Address_Windowing_Extensions wikiPageWikiLink Science.
- Address_Windowing_Extensions wikiPageWikiLink Scientific.
- Address_Windowing_Extensions wikiPageWikiLink Software.
- Address_Windowing_Extensions wikiPageWikiLink Windows_2000.
- Address_Windowing_Extensions wikiPageWikiLink Windows_NT_4.0.
- Address_Windowing_Extensions wikiPageWikiLinkText "AWE".
- Address_Windowing_Extensions wikiPageWikiLinkText "Address Windowing Extensions".
- Address_Windowing_Extensions hasPhotoCollection Address_Windowing_Extensions.
- Address_Windowing_Extensions wikiPageUsesTemplate Template:Refimprove.
- Address_Windowing_Extensions wikiPageUsesTemplate Template:Reflist.
- Address_Windowing_Extensions subject Category:Microsoft_application_programming_interfaces.
- Address_Windowing_Extensions subject Category:Windows_NT_architecture.
- Address_Windowing_Extensions subject Category:X86_memory_management.
- Address_Windowing_Extensions hypernym Interface.
- Address_Windowing_Extensions type Software.
- Address_Windowing_Extensions comment "Address Windowing Extensions (AWE) is a Microsoft Windows application programming interface that allows a 32-bit software application to access more physical memory than it has virtual address space, even in excess of the 4 GB limit. The process of mapping an application's virtual address space to physical memory under AWE is known as "windowing," and is similar to the overlay concept of other environments.".
- Address_Windowing_Extensions label "Address Windowing Extensions".
- Address_Windowing_Extensions sameAs Address_Windowing_Extension.
- Address_Windowing_Extensions sameAs m.0264b7s.
- Address_Windowing_Extensions sameAs Address_Windowing_Extensions.
- Address_Windowing_Extensions sameAs Q353355.
- Address_Windowing_Extensions sameAs Q353355.
- Address_Windowing_Extensions wasDerivedFrom Address_Windowing_Extensions?oldid=676621695.
- Address_Windowing_Extensions isPrimaryTopicOf Address_Windowing_Extensions.