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Microsoft has published few KBs on How to use DebugDiag tool.Memory dump -How to use the Debug Diagnostics 1.0 tool to analyze a memory dump file
Hang -How to use the Debug Diagnostics tool to troubleshoot a process that has stopped responding in IISCrash -How to use the IIS Debug Diagnostics Tool to troubleshoot an IIS process that stops unexpectedly High CPU Usage -How to use the Debug Diagnostics Tool to troubleshoot high CPU usage by a process in IISHigh Memory Usage -How to troubleshoot an IIS process that consumes lots of memory by using the IIS Debug Diagnostics tool