w3wp

W3WP.EXE using 100% CPU – where to start?

Standard Windows performance counters (look for other correlated activity, such as many GET requests, excessive network or disk I/O, etc); you can read them from code as well as from perfmon (to trigger data collection if CPU use exceeds a threshold, for example) Custom performance counters (particularly to time for off-box requests and other calls … Read more

What is w3wp.exe?

An Internet Information Services (IIS) worker process is a windows process (w3wp.exe) which runs Web applications, and is responsible for handling requests sent to a Web Server for a specific application pool. It is the worker process for IIS. Each application pool creates at least one instance of w3wp.exe and that is what actually processes requests in … Read more