Microsoft IIS Metrics

Friendly Name FQN Description
Get Requests/sec Web_get_requests_per_sec The number of GET requests made per second.
Post Requests/sec Web_post_requests_per_sec The number of POST requests made per second.
Current Connections Web_current_connections The number of connections currently established with the web service.
Connection Attempts/sec Web_connect_attempts_per_sec The number of connection attempts per second.

To see a full list of metrics for the Windows Agent, see this page.