FIX: High CPU Usage When SNMP Retrieves Performance Counters

 Last reviewed: October 29, 1997
Article ID: Q130563
3.50 WINDOWS NT kbnetwork kbfixlist kbbuglist

The information in this article applies to:

  • Microsoft Win32 Software Development Kit (SDK) version 3.5

SYMPTOMS

When an SNMP extension agent tries to retrieve performance counters, CPU utilization jumps to 100 percent.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This problem was corrected in Windows NT version 3.51.

MORE INFORMATION

If an SNMP extension agent tries to retrieve performance counters as in the following example, the CPU utilization is observed to jump to 100 percent and stay there until the SNMP service is stopped. 

   RegOpenKeyEx(...);
   .
   .
   RegQueryValueEx(HKEY_PERFORMANCE_DATA,
   ...)
To see this, use the Performance Monitor tool in the Administrative Tools program group.

The same problem can occur when an application is trying to retrieve TCP/IP performance counters and the Internet MIB II agent is being used to retrieve the counters.

REFERENCES

For more information, please see the Windows NT 3.5 Resource Kit Vol IV.

Additional reference words: 3.50
KBCategory: kbnetwork kbfixlist kbbuglist
KBSubcategory: NtwkSnmp
Solution Type : kbfix

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.

Last reviewed: October 29, 1997
© 1998 Microsoft Corporation. All rights reserved. Terms of Use.