PerfMon is an excellent tool to examine runtime processes. Here are the counters I normally use.

Examining .NET Memory

Process
- Private bytes – the amount of private bytes the application uses.
- Thread count – the number of threads that are running in the process.
.NET CLR Memory
- #Bytes in all heaps.
.NET CLR Loading
- Bytes in loader heap
- Current assemblies

Examining ASP.NET Requests

ASP.NET Apps v...
- Anonymous request/sec

Version author:
Mattias Lövström

EPiServer version

All