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# Diagnostic Images

Column Display Related Tasks

A diagnostic image is a file that contains a snapshot, or dump, of a server's state and configuration data. Support personnel can use this data for post-failure analysis.

Use this page to change the default location to which a server writes its image file or to force a server to write its diagnostic image (capture the image).

The diagnostic image contains such data as the state and configuration of a server and its subsystems along with any data harvested from diagnostics modules that you have configured. For example it describes, the value of the log cache, the status of work managers, and the JNDI state.

A server automatically writes an image when it fails, and you can capture a snapshot image at any other time.

#### Column Display

You can show fewer or additional data points on this page by expanding Customize this table and modifying the Column Display list. Each data point displays in its own table column.

The following table lists all of the data points that you can display in columns on this page.

Name | Description
--- | ---
Server |
Destination Directory |
Timeout |
Status of Last Action | Status information related to this task.

Related Tasks

- Configure and capture diagnostic images
- Capture diagnostic images
- Specify destination directories for diagnostic images