# Information Schema XtraDB Tables

- [Information Schema CHANGED\_PAGE\_BITMAPS Table](https://mariadb.com/docs/server/reference/system-tables/information-schema/information-schema-tables/information-schema-xtradb-tables/information-schema-changed_page_bitmaps-table.md): The XTRADB\_INTERNAL\_HASH\_TABLES table provides memory usage statistics for internal hash tables used by the XtraDB/InnoDB storage engine.
- [Information Schema XTRADB\_INTERNAL\_HASH\_TABLES Table](https://mariadb.com/docs/server/reference/system-tables/information-schema/information-schema-tables/information-schema-xtradb-tables/information-schema-xtradb_internal_hash_tables-table.md): The XTRADB\_INTERNAL\_HASH\_TABLES table provides memory usage statistics for internal hash tables used by the XtraDB/InnoDB storage engine.
- [Information Schema XTRADB\_READ\_VIEW Table](https://mariadb.com/docs/server/reference/system-tables/information-schema/information-schema-tables/information-schema-xtradb-tables/information-schema-xtradb_read_view-table.md): The XTRADB\_READ\_VIEW table displays the current MVCC read views, showing which transactions are visible to active queries.
- [Information Schema XTRADB\_RSEG Table](https://mariadb.com/docs/server/reference/system-tables/information-schema/information-schema-tables/information-schema-xtradb-tables/information-schema-xtradb_rseg-table.md): The XTRADB\_RSEG table contains detailed information about the rollback segments used by XtraDB for undo logging and MVCC.


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