# PostgreSQL Concepts – DigitalOcean Documentation

> Explanations and definitions of core concepts in PostgreSQL.
- [Best Practices](https://docs.digitalocean.com/products/databases/postgresql/concepts/best-practices/index.html.md): Recommended practices to implement when setting up and running your PostgreSQL clusters.
- [Optimize Shared Buffers](https://docs.digitalocean.com/products/databases/postgresql/concepts/shared-buffers/index.html.md): Check and set the `shared_buffers` parameter based on available memory to improve cache hit ratio and reduce disk access.
- [Shared Responsibility Model](https://docs.digitalocean.com/products/databases/postgresql/concepts/responsibility-model/index.html.md): Description of DigitalOcean's responsibilities as a managed database provider.
- [Migration Strategies](https://docs.digitalocean.com/products/databases/postgresql/concepts/migration-strategies/index.html.md): Tips on how to transition to your new database upon migration.