Out of System PTEs on a Computer w/ More Than 768 MB of Memory (156767)
The information in this article applies to:
- Microsoft Windows NT Advanced Server 3.1
- Microsoft Windows NT Workstation 3.1
- Microsoft Windows NT Workstation 3.5
- Microsoft Windows NT Workstation 3.51
- Microsoft Windows NT Server 3.1
- Microsoft Windows NT Server 3.5
- Microsoft Windows NT Server 3.51
This article was previously published under Q156767 SYMPTOMS
Your total system paged table entries (PTEs) may not scale up as you add
more memory. In fact, you may have fewer system PTEs available after
exceeding 768 MB of memory.
CAUSE
Computers with more than 768 MB of physical memory have fewer available
system PTEs than computers with less memory. Increasing the memory capacity
of a computer from 512 MB to 1 GB, for example, means you can now run fewer
threads. The algorithm for Microsoft Windows NT version 3.51 trades off
non-paged pool and system PTE space. Once the sum of these two regions
exceeds the allowable space, the number of system PTEs is reduced. On a DEC
Alpha computer, this occurs around 768 MB of physical memory.
STATUS
Microsoft has confirmed this to be a problem in Microsoft Windows NT
versions 3.1, 3.5, and 3.51. This problem has been corrected in Microsoft
Windows NT version 4.0.
| Modification Type: | Major | Last Reviewed: | 3/29/2004 |
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| Keywords: | kbnetwork KB156767 |
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