# Tidb Dashboard Traffic Visualization

+ How the overall write traffic changes over time
+ Details of a heat map coordinate, database object name, type, and range of the start and end keys of the Region
+ Identify information for tables, indexes, etc.


![left](./student-guide/diagram/21-Flow-visualization-01-01.png)

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The traffic visualization page (Key Visualizer) can be used to analyze the usage patterns of TiDB clusters and troubleshoot traffic hotspots. This page visualizes the reads and writes traffic of the TiDB cluster over a period of time.
The graph's abscissa is time, the ordinate is the individual tables and indexes, and the brighter the color represents the greater the flow. You can switch the display of read or write traffic, and the time range in the toolbar.
The following information can be observed from the traffic visualization interface above:
- Number 1: How the overall write traffic changes over time
- Number 2: Details of a heat map coordinate, database object name, type, and range of the start and end keys of the Region
- Number 3: Identifies information for tables, indexes, etc.