Adjusting the Virtual Address Space

32-bit operating systems are capable of addressing 4 GB of virtual address space, however access to this memory is divided evenly between applications and the operating system. On a server with 4GB of RAM installed, and running a 32-bit operating system, only 2GB of address space will be available to applications.

You can direct the operating system to make 3GB of the address space available to applications if you find that VTScada requires more than the 2GB of memory that would normally be available. This is likely to occur only in very large applications.

Use the instructions in this section only if all of the following are true:

· You are running the 32-bit version of VTS.

· Your server has 4GB of RAM installed

· Your server is running a 32-bit operating system.

· You have an application that is using more than 1GB of memory.

You can determine the memory in use by opening the About VTScada box from the VTScada Application Manager.

 

The 32-bit version of VTScada, running on a server with a 64-bit operating system can address 4GB without changes to the system configuration.

The 64-bit version of VTScada, running on a server with a 64-bit operating system can address up to 8096GB of memory.

 

Adjusting the Address Space in Windows 7 and Windows 8:

1. Type the following at a Windows command prompt that has been opened with Administrative privileges.

BCDEDIT /Set IncreaseUserVa 3072

2. Re-boot your computer.