Remove From My Forums. Asked by:. Archived Forums. Sign in to vote. Can we use this all available Memory without upgrading to Windows Enterprise Edition Pl can you answer this Question at the earliest and at your convenience.
Thursday, June 4, PM. In this case, the operating system does not use any memory in excess of 16 GB. This behavior is caused by kernel virtual memory space considerations.
AWE is a set of application programming interfaces APIs to the memory manager functions that enables programs to address more memory than the 4 GB that is available through standard bit addressing.
AWE enables programs to reserve physical memory as non-paged memory and then to dynamically map portions of the non-paged memory to the program's working set of memory. This process enables memory-intensive programs, such as large database systems, to reserve large amounts of physical memory for data without having to be paged in and out of a paging file for usage. Instead, the data is swapped in and out of the working set and reserved memory is in excess of the 4 GB range.
The following is an example of a Boot. For more information, click the following article number to view the article in the Microsoft Knowledge Base:. The program is not aware that any of the memory that it uses resides in the range greater than 4 GB, just as a program is not aware that the memory it has requested is actually in the page file. The reserved memory is non-pageable and is only accessible to that program. If the server has a redundant memory feature or a memory mirroring feature that is enabled, the full complement of memory may not be visible to Windows.
Instead, the data is swapped in and out of the working set and reserved memory is in excess of the 4-GB range. To summarize, PAE is a function of the Windows and Windows Server memory managers that provides more physical memory to a program that requests memory. The program isn't aware that any of the memory that it uses resides in the range greater than 4 GB, just as a program isn't aware that the memory it has requested is actually in the page file.
The reserved memory is non-pageable and is only accessible to that program. If the server has a redundant memory feature or a memory mirroring feature that is enabled, the full complement of memory may not be visible to Windows.
Redundant memory provides the system with a failover memory bank when a memory bank fails. Memory mirroring splits the memory banks into a mirrored set. To modify the settings for these features, you may have to refer to the system user manual or the OEM Web site. As it is enabled at the system level, AWE is enabled for instances running on individual nodes. If you are working with a server with more than 16GB of RAM, you will need to choose between the two.
It is important to note that once either or both of these switches are in place in the BOOT. Thus, in a case where multiple Oracle instances are running on the same server, ALL instances can take advantage of the additional memory afforded by these switches, up to the amount of physical memory on the box.
Understanding the Oracle implementation of AWE support. There is still confusion on the old style. Instead, the windowing technology as described in these articles is being used. The physical location of these blocks does not matter. The pages in physical memory above 4GB are then mapped into this window and paged back into physical memory above 4GB when there is demand for space in thw window for other blocks for the ORACLE. EXE process to be able to access them in its conventional address space.
In this scenario, it does not matter where the blocks are physically located — there is no need to be concerned with where the blocks are physically residing. The window will be drawn around the block i. This will be discussed further down in the section on troubleshooting. EXE will be 3GB. EXE process. EXE process includes the following:.
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