History

Use the History configuration tab to set the display and scaling options for the history instance view screen.

• Number of top values to display - Determines the default amount of top items that are retrieved when the navigation tree is expanded.

• Select Collection - Specifies the set from which you may select dimensions for display. Select a User Defined Collection rather than the default History if it includes dimensions which, because of resource consumption constraints, consists of a larger set.  

• Selected dimensions - Determines the dimensions for which historical processes and queries can be performed and their order appearance in the navigation tree. The set of available dimensions is specified during StealthCollect installation and cannot be subsequently changed.

• Activity Timeline Scaling Options - The three checkboxes determine the scaling and display of the historical activity timeline graph.

• Select the Scale graph to instance check box if you want the display to retain the instance vertical scaling.  Thus, any drilldown activity display is proportional to the total instance activity, granting you an immediate sense of its significance.
  
  If cleared, the display scale is that of the dimension subset of which the present drilldown is a part. (For example, the vertical scale could be a specific SQL statement and the activity representation, that of a specific database user's portion within it.)  

• Select the Focus on target activity checkbox if you want the scale to recalibrate as you drill down within dimensions.
  
  If cleared, the scale reverts to that of the instance (if selected, as above) or that of the dimension in which this drill down is a part.

• Select the Show total in graph checkbox to display a dotted line representing total instance activity.