Database Connection Pool Exhausted After Refactoring

1. Connections opened but not closed after use (missing pool.release())
2. Error handling removed, preventing cleanup in catch blocks
3. Pool size configuration reduced to 0 or very low during refactoring
4. Long-running transactions holding connections beyond necessity
5. Connection timeout increased, connections staying open longer

Always close/release connections: try { const conn = await pool.acquire(); ... } finally { pool.release(conn); }. Use connection pooling config: {min: 5, max: 20}. Reduce transaction duration. Monitor pool stats with pool.status().