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Directory Service Log and System Monitor Troubleshooting
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Table 14-3 describes some troubleshooting scenarios related to the directory service log and System Monitor.
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Lesson 1
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Monitoring Performance with Service Logs and System Monitor
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14-15
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Table 14-3 Directory Service Log and System Monitor Troubleshooting Scenarios
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Causes
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Solutions
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Problem: System Monitor shows gaps in its line graphs. Reduce the performance overhead of system
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Data collection was subordinated to monitoring.
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higher priority processing activity on a system with a heavy load. When the
system has adequate resources to
continue with data collection, the graphing
resumes as usual. A message appears
describing this.
Problem: Counter values consistently equal zero. The process being monitored has stopped so there is no data for the process in the performance-monitoring tools. The counter dynamic link library (DLL) was disabled after you selected the corresponding counters in a log or display. The performance tools do not detect that the counter was removed or disabled but report the counter data as zeroes. You lack permissions on the computer being monitored. If you don t have appropriate permissions to access the computer, an error message is displayed when you attempt to select the counter, and you are not able to add it to the histogram or graph. If you install a new application that installs performance counters on your operating system, the operating system creates a backup copy of the performance counter registry entries taken prior to the addition of the application s performance counters file. This backup is saved as a file named PerfStringBackup.ini. If your operating sys tem successfully adds the application s per formance counters file, it then replaces the previous version of the PerfStringBackup.ini file with the file that it just created. If you stopped the process manually, restart it to see the process in System Monitor. Otherwise, check Event Viewer for concurrent entries. You might find an error associated with this process. Enable the corresponding counter DLL.
An administrator must ensure that your user account has permissions to use the performancemonitoring tools.
Problem: Counters no longer work properly after the installation of a new application. Restore the performance counter registry to the state described in the uncorrupted backup file by using the command lodctr /r:filename where filename is the name of the backup performance counter registry entry file.
14-16
14
Managing Active Directory Performance
Table 14-3 Directory Service Log and System Monitor Troubleshooting Scenarios (Continued)
Causes
Solutions
Problem: Objects, counters, or instances seem to be missing or invalid. Test routines that run when you start the Performance console have detected a problem with installed counters and have disabled the counters automatically to prevent the counters from slowing the system. Disabled objects and counters do not appear in the Add Counters dialog box. Enable the disabled counters by using the Registry Editor. Change the value under HKEY_LOCAL_MACHINE\SYSTEM\CurrentCon trolSet\Services\Service_name\Performance\ Disable Performance Counters from 1 for disable to 0 for enable. Note that counters that have been disabled after initial testing are likely to contain errors and might cause system problems. Turn off the counter DLL automatic testing feature or adjust the level of testing. Using the Registry Editor, locate the Configuration Flags subkey under HKEY_LOCAL_MACHINE\Software\ Microsoft\Windows NT\CurrentVersion\Perflib and change the value of the REG_DWORD entry. Use Task Manager to verify that the process is running. If so, use Exctrlst.exe on the Resource Kit companion CD-ROM to verify that the counter DLL is enabled. Make sure that the service or feature that provides the counter has been installed or configured. Check Event Viewer to see whether the counter DLL or the Performance Data Helper reported any errors. If necessary, you can disable counter DLLs that are causing errors by using Exctrlst.exe on the Microsoft Windows Server 2003 Resource Kit, available on the Microsoft Web site at http:// www.microsoft.com/windowsserver2003/techinfo/ reskit/resourcekit.mspx. Monitor the application via the NTVDM process.
The process that starts the object counters is not started or installed.
The counters haven t been enabled. The DLL that installs the counters is generating errors. An example is if the counter does not handle localization functions correctly.
You are trying to monitor a 16-bit or MS-DOS application. Only 32-bit processes appear in the instances list. Active 16-bit processes appear as threads running in a Windows NT Virtual DOS Machine (NTVDM) process.
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