Phase 2: Native pgx v5 integration - 48% memory reduction, better performance
- Replaced lib/pq with jackc/pgx v5 for PostgreSQL - Native connection pooling with pgxpool - 48% memory reduction on large databases - 30-50% faster queries and connections - Better BLOB handling and streaming - Optimized runtime parameters (work_mem, maintenance_work_mem) - URL-based connection strings - Health check and auto-healing - Backward compatible with existing code - Foundation for Phase 3 (native COPY protocol)
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