> 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/analytics/mariadb-columnstore/architecture/columnstore-system-databases.md).

# ColumnStore System Databases

When using ColumnStore, MariaDB Server creates a series of system databases used for operational purposes.

| Database             | Description                                                                                                                                                                                                                                                |
| -------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| calpontsys           | Database maintains table metadata about ColumnStore tables.                                                                                                                                                                                                |
| infinidb\_querystats | Database maintains information about query performance. For more information, see [Query Analysis](/docs/analytics/mariadb-columnstore/high-availability/analyzing-queries-in-columnstore.md).                                                             |
| columnstore\_info    | The database for stored procedures is used to retrieve information about ColumnStore usage. For more information, see the [ColumnStore Information Schema](/docs/analytics/mariadb-columnstore/reference/columnstore-information-schema-tables.md) tables. |

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