Connection Pooling Patterns (2026)

Database and HTTP connection pooling for high-performance async Python applications.

Overview

• Configuring asyncpg/SQLAlchemy connection pools
• Setting up aiohttp ClientSession for HTTP requests
• Diagnosing connection exhaustion or leaks
• Optimizing pool sizes for workload
• Implementing health checks and connection validation

Quick Reference

SQLAlchemy Async Pool Configuration

from sqlalchemy.ext.asyncio import create_async_engine