IIS Application Pools Test

An Application Pool can contain one or more applications and provides a level of isolation between different Web applications. For example, if you want to isolate all the Web applications running in the same computer, you can do this by creating a separate application pool for every Web application and placing them in their corresponding application pool. Because each application pool runs in its own worker process, errors in one application pool will not affect the applications running in other application pools.

The IIS Application Pools test discovers all the application pools configured on an IIS Web server and monitors their status. Note that this test will work on IIS v. 6.0 and above only.

Target of the test : An IIS web server

Agent deploying the test : An internal agent;

Outputs of the test : One set of results for every web site monitored

Configurable parameters for the test
  1. TEST PERIOD - How often should the test be executed
  2. Host - The host for which the test is to be configured
  3. Port - the port to which the specified host listens
  4. DETAILED DIAGNOSIS - To make diagnosis more efficient and accurate, the eG Enterprise embeds an optional detailed diagnostic capability. With this capability, the eG agents can be configured to run detailed, more elaborate tests as and when specific problems are detected. To enable the detailed diagnosis capability of this test for a particular server, choose the On option. To disable the capability, click on the Off option.

    The option to selectively enable/disable the detailed diagnosis capability will be available only if the following conditions are fulfilled:

    • The eG manager license should allow the detailed diagnosis capability
    • Both the normal and abnormal frequencies configured for the detailed diagnosis measures should not be 0.

Measurements made by the test
Measurement Description Measurement Unit Interpretation

Application pool status:

Indicates the current status of this application pool.


If this measure returns the value 1, it indicates that the application pool has started or is starting. While the value 0 for this measure indicates that the application pool has stopped or is stopping, the value -1 indicates that the pool is in an 'Unknown' state. If this measure reports the value 0 or -1, then you need to make sure that the application pool is started. If a pool has stopped, then you can use the detailed diagnosis of this measure to identify the applications that are impacted as a result of this pool stopping.