## 4.3.2.1 Overview Page
Visualization of execution plans automatically displays an Overview page.
Some important KPIs required to begin a performance analysis are shown on the Overview page so that you can see a big picture of what is going on before going into the complex details.
## Overview Page
The following table describes the nature of each KPI:
| KPI                         | Description                                                                          | Comment                                                                                                                                                                                        |
|-----------------------------|--------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Execution                   | Total duration of the query excluding compilation time                               |                                                                                                                                                                                                |
| Dominant Operators          | Operators sorted by their execution time (top 3)                                     | You can click on any operator name to move to the corresponding visualized operator in the graph                                                                                               |
| Number of Nodes             | Number of servers involved in the exe- cution                                        | You can click on the value to see how much time was spent in each node                                                                                                                         |
| Number of Network Transfers | Total number of network transfers that have occurred during execution                | You can click on the value to open 'Net- work View' which visualizes the trans- fers in more detail                                                                                            |
| Dominant Network Transfers  | Network transfers sorted by their exe- cution time (top 3)                           | You can click on any network transfer to move to the corresponding visualized transfer in the graph. Note: This section only appears if the query was executed in a distributed en- vironment. |
| SQL Query                   | The statement that was executed                                                      |                                                                                                                                                                                                |
| System                      | The system where the execution oc- curred (that is, where final results are fetched) |                                                                                                                                                                                                |
| Memory Allocated            | Total memory allocated for executing the statement                                   |                                                                                                                                                                                                |
| Number of Tables Used       | Total number of tables touched upon by any operator during execution                 | You can click on the value to open the 'Tables Used View' for more detail re- garding each table                                                                                               |
| Maximum Rows Processed      | The largest number of rows processed by any single operator                          |                                                                                                                                                                                                |
| Result Record Count         | The final result record count                                                        |                                                                                                                                                                                                |