Performance Hub: General layout and usability improvements

The Performance Hub user interface has been updated to allow customers to view the Performance Hub data more easily and efficiently, without the need to scroll. The following changes have been made to the UI:

• The time slider panel can be collapsed to allow more room on the screen for other data.
• The height of the ASH Analytics activity chart has been reduced.
• The display controls have been repositioned for easier access.
• The page title and database name have been consolidated in the panel header.

For more information, see Using Performance Hub to Analyze Database Performance.