Database Connection Pool Tuning overview

Analyzes and optimizes database connection pool configurations -- profiling connection checkout latency, identifying pool exhaustion events, measuring connection idle timeout effectiveness, evaluating pool size against concurrent query load, analyzing connection leak patterns via stack trace attribution, testing pool warm-up strategies, validating PgBouncer/ProxySQL intermediate pooler settings, and recommending pool parameter changes with load-test validation. Excludes query optimization and schema migration.