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# Metrics

DataFusion operators expose runtime metrics so you can understand where time is spent and how much data flows through the pipeline. See more in [EXPLAIN ANALYZE](sql/explain.md#explain-analyze).

## Common Metrics

### BaselineMetrics

`BaselineMetrics` are available in most physical operators to capture common measurements.

| Metric          | Description                                            |
| --------------- | ------------------------------------------------------ |
| elapsed_compute | CPU time the operator actively spends processing work. |
| output_rows     | Total number of rows the operator produces.            |

## Operator-specific Metrics

TODO