Database

Open LangGraph Server supports multiple database backends for persisting graph state, checkpoints, thread metadata, and message queues. Choose the right database solution based on your application's needs for performance, reliability, and scalability.

Quick Reference

Storage Architecture

Open LangGraph Server uses a layered storage approach where different components can use different storage backends:

Each layer can be configured independently based on your performance and reliability requirements.

Configuration Priority

Open LangGraph Server automatically selects storage backends based on environment variables with this priority:

1. Redis (if REDIS_URL set and CHECKPOINT_TYPE matches)
2. PostgreSQL (if DATABASE_URL set)
3. SQLite (if SQLITE_DATABASE_URI set)
4. Memory (fallback default)

Choosing the Right Storage

For Development & Testing

• Memory Storage: Fastest setup, no persistence needed
• SQLite: File-based persistence for local development

For Production Applications

• PostgreSQL: Enterprise-grade reliability and concurrent access
• Redis: High-performance caching with TTL management

For High-Performance Use Cases

• Redis: Sub-millisecond response times, distributed caching
• PostgreSQL + Redis: Combine durability with performance