Data Engineer
hardde-sql-performance
How do you tune SQL performance in warehouses (partitioning, clustering, pruning)?
Answer
Warehouse performance depends on scanning less data.
Tactics:
- Partition by common filters
- Cluster/sort by join keys
- Write queries that enable pruning
- Avoid wide SELECT *
Always measure with query plans and cost metrics. Optimize the highest-cost queries that affect dashboards and SLAs.
Related Topics
SQLPerformanceWarehousing