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Microsoft Windows
20.1 Microsoft Windows
Memory Usage
Allow up to 3GB of memory usage under 32-bit Windows
By default, 32-bit Windows versions allow applications to run in a 2GB memory space. Applications that attempt
to use more than this 2GB limit will crash. When working with very large data sets, it may no longer be
possible to fit the required data into the default memory space supplied by Windows. Using the /3GB switch in
boot.ini allows certain applications to access up to 3GB of virtual address space leaving 1GB for the windows
kernel.
To allow SVS to use more than 2GB of memory, you can edit your systems boot.ini file.
To open the boot.ini file:
- Click Start, click Run
- Enter sysdm.cpl, and click OK
On the resulting window, select the Advanced tab, and click Settings under Startup and Recovery. Next, click the
Edit button in the System startup group.
Now the boot.ini file should be open in a Notepad editor. Before you edit the file, it is recommended that you
create a backup of the original. To do this: select File > Save As..., and choose a location to create the
backup file. Close the Notepad editor, and click the Edit button again. Now you should be ready to edit the
file.
To allow SVS to use up to 3GB of memory add the entry /3GB to the end of the line under the [operating systems] section corresponding to your current configuration. Save the file to keep this option. A reboot is required before the change will take effect.
Memory Availability Under 64-bit Windows
Windows XP Professional x64 Edition (for PCs with x86-64 processors) is capable of running SVS in its 32-bit emulation
mode efficiently and allows the application to address up to 4 GB of virtual memory if available. Windows XP 64-bit Edition
(built for Intels IA-64 Itanium processors) is discontinued as an operating system as of 2005, and is not supported by Golden
Helix, Inc., Inc.