Description of the illustration undo_management

This screenshot shows the Automatic Undo Management page. The page has two subpages: General and System Activity. The General subpage is displayed. This subpage has the following three sections:

Undo Retention Settings, at the upper left

This section contains these two fields, arranged from top to bottom: a read-only Undo Retention field (currently set to 180 minutes), and a read-only Retention Guarantee field, whose value is a link. The value is currently "No".
Undo Tablespace for this Instance, at the upper right

This section contains these three read-only fields, arranged from top to bottom: a Tablespace field, whose value is a link (with current value UNDOTBS), a Size field, and an Auto-Extensible field, whose value is a link (with current value Yes).
Undo Advisor: Undo Retention and Undo Tablespace Sizing Advice, beneath the other sections and taking up the rest of the page.

This section contains these three subsections, arranged from top to bottom:
- Analysis Period subsection
  
  This subsection contains these fields: an Analysis Time Period list, with current value "Last Seven Days"; a pair of options named Desired Undo Retention, which determine how the Undo Advisor's analysis is to be run, with the following two option names: "Automatically chosen based on longest query in analysis period" and "Specified manually to allow for longer duration queries or flashback"; and a Duration field, which pertains to the second option.
  
  Beneath these fields is a Run Analysis button.
- Analysis Results subsection
  
  This subsection contains two button at the upper right-hand corner. The buttons are the following, arranged from left to right: Edit Undo Tablespace and Edit Undo Retention. Below the buttons are these read-only fields, arranged from top to bottom: Selected Analysis Time Period, Minimum Required Undo Tablespace Size (MB), Recommended Undo Tablespace Size (MB), Potential Problems (whose value is "No problem found"), and Recommendations (whose value is "No recommendation").
- Graph subsection
  
  The graph is currently hidden, and a Show Graph link, with a hide/show icon, is available.
End of description.