# 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](https://mariadb.com/docs/analytics/mariadb-columnstore/high-availability/analyzing-queries-in-columnstore).                                                             |
| columnstore\_info    | The database for stored procedures is used to retrieve information about ColumnStore usage. For more information, see the [ColumnStore Information Schema](https://mariadb.com/docs/analytics/mariadb-columnstore/reference/columnstore-information-schema-tables) tables. |

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