1. Performance Schema: A tool for monitoring MySQL server performance, which can provide rich monitoring and diagnostic information.
2. Information Schema: A virtual database used to access database metadata, including information about databases, tables, fields and other objects.
3. Memcached: Caching engine, used to increase reading speed and cache commonly used data in memory.
4. Connect: You can access other database systems in MySQL, such as Oracle, SQL Server, etc.
5. OpenGIS: Provides spatial data storage and analysis functions, allowing the development of geographic information system (GIS) applications.
6. Example: Provides a simple example storage engine for learning and testing.
7. Spider: Data can be dispersed into multiple MySQL databases or other types of databases to build a distributed database system.
These non-storage engines are typically used to extend and optimize MySQL database systems, improving performance and functionality.