All data collection is interval based as this is the most efficient way to reduce the system overheads produced by performance data collection. This means that complete flexibility and choice is available for how often data is collected.
A Display table will only show one interval at a time but graphs can plot data over multiple intervals.
Data collection intervals for a Display chart or table are set with the 'Refresh Rate' field on the Data - Data Tab. The 'Chart Intervals' field on the Chart Tab - Presentation Tab is used to set how many time intervals can be shown on a graph.