yuseok89 opened a new pull request, #67721:
URL: https://github.com/apache/airflow/pull/67721
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While reviewing #67242, we found that several existing UI queries are also
slower than expected on large dag_run tables (verified with ~`5M` DagRuns).
Adding new indexes would be a larger change (a migration), so this PR focuses
on reusing the existing indexes. If there's a better direction, I'd appreciate
your input.
### Changes (per query)
- Dashboard historical_metrics: window now filters on the indexed run_after
instead of the unindexed start_date/end_date.
- Dashboard dag_stats: latest run per Dag via correlated ORDER BY
logical_date DESC LIMIT 1 instead of MAX(...) GROUP BY scanning every run.
- Dags list get_dags recent runs: top-N per Dag via ORDER BY run_after DESC
LIMIT N instead of rank() over all runs.
## Screenshots
### Before
<img width="867" height="706" alt="Screenshot 2026-05-29 at 11 30 26 PM"
src="https://github.com/user-attachments/assets/9971adf5-aa09-42bd-be02-87bbc2e8df34";
/>
<img width="869" height="706" alt="Screenshot 2026-05-29 at 11 33 52 PM"
src="https://github.com/user-attachments/assets/b42ddf89-5960-4b9a-bd5b-6ec8b169aaba";
/>
### After
<img width="813" height="659" alt="image"
src="https://github.com/user-attachments/assets/04e1db79-a26d-451f-880a-063a5a684d71";
/>
<img width="814" height="660" alt="image"
src="https://github.com/user-attachments/assets/5d2faad0-87b6-4c59-87d2-e197c71e19b7";
/>
cc @pierrejeambrun
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