Registry Size Limit Change Results in PagedPoolSize Change (140364)
The information in this article applies to:
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Datacenter Server
- Microsoft Windows 2000 Professional
- Microsoft Windows 2000 Server
- Microsoft Windows NT Workstation 3.51
- Microsoft Windows NT Workstation 4.0
- Microsoft Windows NT Server 3.51
- Microsoft Windows NT Server 4.0
This article was previously published under Q140364 SYMPTOMS When changing the registry size, the entry for
PagedPoolSize may be automatically changed from its default setting of zero to
a fixed value. This could result in unexpected and or undesirable behavior on a
Windows NT server. CAUSE The registry is not allowed to consume more than 80% of the
Paged Pool. If you adjust the Registry Size Limit (RSL) in the Virtual Memory
dialog box in the System section of Control Panel to a value greater than 80%
of the current PagedPoolSize setting, the PagedPoolSize registry entry is
automatically changed from the default setting of zero to a value equal to 125%
of RSL.
NOTE: For both Windows NT 3.51 and 4.0, the PagedPoolSize
registry entry is set to zero by default in Setup. When this registry entry is
set to zero, the actual PagedPoolSize is calculated dynamically based on your
current memory configuration. Under Windows NT 3.51 prior to Service Pack 4,
the resulting field value from an RSL change could be lower than the one
dynamically calculated. For Windows NT 3.51 after SP4 and for Windows NT 4.0
the zero will be maintained if the calculation for paged pool based on the
physical memory is larger than the calculation based on the registry size
limit.WORKAROUND Depending on the increase in RSL you can reset the
pagedpoolsize back to zero in the registry. A rule of thumb would be to use the
amount of memory as a benchmark for the amount of pagedpoolsize created
dynamically and if the new RSL is less than 80% of that value then it is
probably safe to set pagedpoolsize back to zero. These values may be
modified in the registry. WARNING: Using the Registry Editor
incorrectly can cause serious, system- wide problems that may require you to
reinstall Windows NT to correct them. Microsoft cannot guarantee that any
problems resulting from the use of the Registry Editor can be solved. Use this
tool at your own risk. The pagedpoolsize parameter is located in the
following registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management
RESOLUTION This problem has been corrected in the latest Service Pack
for Windows NT version 3.51. STATUS Microsoft has confirmed this to be a problem in Windows NT
version 3.51. This problem was corrected in the latest Windows NT 3.51 U.S.
Service Pack. For information on obtaining the Service Pack, query on the
following word in the Microsoft Knowledge Base (without the spaces):
| Modification Type: | Major | Last Reviewed: | 5/7/2003 |
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| Keywords: | KB140364 |
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