> 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

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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