advanced~4h
Performance — EXPLAIN ANALYZE, Partitioning & Sharding
SQL performance optimization is one of the most valuable skills in database work. Understanding how the query planner works, reading execution plans, and applying the right optimization strategy can t
Learning objectives
- Read an EXPLAIN ANALYZE plan and identify the single most expensive step in it.
- Explain the specific difference between what EXPLAIN estimates and what EXPLAIN ANALYZE actually measures.
- Distinguish partitioning from sharding, and explain why one keeps you on one server and the other doesn't.
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Performance — EXPLAIN ANALYZE, Partitioning & Sharding