FIX: High CPU Usage When SNMP Retrieves Performance Counters

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.