> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/server/reference/system-tables.md).

# System Tables

Explore system tables in MariaDB Server. These internal tables store metadata and configuration information about the database, essential for administration, monitoring, and advanced querying.

The MariaDB Server includes several system tables that store metadata about database objects, user privileges, and server status.

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[Information Schema](/docs/server/reference/system-tables/information-schema.md)
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The `information_schema` is a standard-compliant database that provides information about all other databases, tables, and columns on the server.
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[Performance Schema](/docs/server/reference/system-tables/performance-schema.md)
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The `performance_schema` allows you to monitor server execution at a low level with minimal impact on performance.
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[Sys Schema](/docs/server/reference/system-tables/sys-schema.md)
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The `sys` schema contains a collection of views, procedures, and functions that simplify the interpretation of data from the `performance_schema`.
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[The mysql Database Tables](/docs/server/reference/system-tables/the-mysql-database-tables.md)
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Contains the core system tables in the `mysql` database, including privilege tables, logging tables, and status variables.
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