We will describe in this post how to indentify an application that causes a CPU time overconsumption on your Domain Controllers. We will use two tools for this: Server Performance Advisor and Wireshark. The first is used if you have a Windows 2003 DC, if OS is Windows 2008 the tool is already included, you access it with MMC snap-in perfmon.msc, its new name is Windows Reliability and Performance Monitor. Both versions have performance counters dedicated to Active Directory, in this post we will use SPA, because the DC having trouble is running Windows 2003. If you want more details on using Windows RPM for AD you can read this article.
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