eG Monitoring
 

Measures reported by IISWebServerTest

This internal test complements the measurements made from an external perspective by the Http test. It collects various statistics that measure the request load on the web server and its responsiveness to the load.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
Connection_rate Indicates the rate of connections to the web server. Conns/Sec An increase or decrease in connection rate can represent a change in user workload.
Request_rate Indicates the rate of requests to the web server during the last measurement period. Reqs/Sec With the advent of HTTP/1.1, multiple requests can be transmitted over the same TCP connection. The ratio of requests per connection can provide an idea of the effectiveness of the HTTP 1.1 protocol.
Data_xmit_rate Indicates the rate at which the data was transmitted by the server during the last measurement period. KB/Sec A large increase in the data transmission rate can be indicative of an increase in the popularity of one or more web sites hosted on the server.
Data_recvd_rate Indicates the rate at which the data was received by the server during the last measurement period. KB/Sec An increase in this value is indicative of an increase in user requests to the server.
Pct_errors Indicates the percentage of error responses from the server during the last measurement period. Percent This is the percentage of errors that occurred due to requests that couldn't be satisfied by the server because the requested document could not be found.
Pct_400_errors Indicates the percentage of responses with a status code in the range 400-499 during the last measurement period. Percent A high value indicates a number of missing/error pages.
Num_current_requests Indicates the number of server threads/processes currently in use for serving requests (this measurement is not available for Apache web servers). Number If a majority of the server threads/processes are in use simultaneously, this may be indicative of a server bottleneck.

Note:

The WebServer test will report metrics for an IIS web server executing on a Windows 2008 host, only if the IIS Management Scripts and Tools feature is installed on that host, and the Web Server role you create enables this feature. If the aforesaid feature is not enabled for the Web Server role, then remove the role and re-create it with the feature enabled.