Activity Timeline
The activity timeline is the principal display of Oracle activity over a specific time period. Its vertical calibration is based on an average of recorded baseline peaks of observed behavior. The dynamic representation displays the resource consumption in:
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a Resource View layered manner such that bottleneck occurrences can be readily identified as to their underlying wait event category causes and isolated for analysis.
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a Baseline Range View manner against the upper and lower boundaries of the baseline range statistical deviation.
It is the principal Performance Analysis tool for monitoring Oracle instance activity, both current and historical. Use this view to look for trends in your database activity, to identify resource consumption, to trace activity, and to review previous activity.