# Page Not Found

The URL `architecture/components/xpand/query-optimizer` does not exist.

You might be looking for one of these pages:
- [Query Optimizer](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/query-optimizer.md)
- [Range Optimizer](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/query-optimizer/range-optimizer.md)
- [Galera Cluster](https://mariadb.com/docs/server/architecture/topologies/galera-cluster.md)
- [Spider Federated](https://mariadb.com/docs/server/architecture/topologies/spider-federated.md)
- [Spider Sharded](https://mariadb.com/docs/server/architecture/topologies/spider-sharded.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://mariadb.com/docs/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://mariadb.com/docs/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/docs/server/ha-and-performance/optimization-and-tuning/query-optimizer.md`)
- Use `Accept: text/markdown` header for content negotiation