This is a screenshot of the Undo Management page with the System Activity subpage displayed. At the top of the subpage is the section "System Activity During Analysis Period." This has a a number of fields that show system activity, the most important of which is the Longest Running Query field. The fields are arranged vertically. Below this section is a graph of Undo Tablespace Usage. The x-axis is time (currently spanning 24 hours) and the y-axis is undo tablespace size. Colored areas under the curve show the amount of space available for reuse, retained for use by queries or Flashback, and used by active transactions. The graph shows no change in tablespace size over the period, but shows a large spike in the last hour in the amount of undo retained.

Below the Undo Tablespace Usage chart is the Undo Retention Auto-Tuning chart. The x-axis is time (currently spanning 24 hours) and the y-axis is minutes. The chart has two lines, one for the length of the longest running query and another for Maximum Possible Query or Flashback Duration (which is consistently 180 minutes). The length of the longest query varies between 0 and 15 minutes.

Below the Undo Retention Auto-Tuning chart is the heading for the Undo Generation Rate chart, but this chart is not shown in the screenshot.

End of description.