Considerations When Running WCI With 3 Gigabyte Process Address Space Support (4GT Feature/3GB Switch)
Last updated on DECEMBER 02, 2016
Applies to:Oracle WebCenter Interaction - Version 5.0 and later
Microsoft Windows (32-bit)
This article describes how Plumtree Corporate Portal 5.x, Plumtree Foundation 6.x, BEA Aqualogic User Interaction 6.x, and Oracle WebCenter Interaction (up to the current version, 10.3.3) support the use of 3 gigabytes of process address space in a 32-bit Windows 2003 platform environment.
Please note that it is a mandatory requirement to use the 4GT feature/3GB switch when running the .NET version of the portal application. This article aims to describe in more detail the mechanics behind implementing this requirement as well as relevant concepts which may prove useful in troubleshooting performance issues related to this requirement. Please keep in mind that apart from the mandatory configuration setting described in this article, which is the 3GB switch itself, all of the other configuration and tuning suggestions should not be conducted without proper monitoring of the Performance Monitor counters in order to determine the true cause of any problem. Unjustified and improper use of these configuration and tuning suggestions could lead to system instability. Likewise, if you do not currently have any memory or performance issues, it is unnecessary to implement these suggestions as they could potentially introduce instability into your portal environment.
For informational purposes, the reason for the requirement of the 4GT feature/3GB switch for .NET portals is to reduce the possibility of poor performance. Because of the nature of how Windows allocates memory to a process, customers are oftentimes unaware that simply having four gigabytes of physical memory available does not result in a process, such as an IIS worker process, being able to take advantage of that memory without the use of the 4GT feature/3GB switch.
It should also be noted that in certain, rare situations, the use of the 4GT feature/3GB switch can introduce instability, which can be rectified by the tuning of additional, related parameters. The mechanics behind a common reason why this condition can occur and the solution for it is described in this article.
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