Server Status Variables The number of rows deleted from  InnoDB  tables. The number of rows inserted into  InnoDB  tables. The number of rows read from  InnoDB  tables. The number of rows updated in  InnoDB  tables. The number of rows deleted from  InnoDB  tables belonging to system-created schemas. The number of rows inserted into  InnoDB  tables belonging to system-created schemas. The number of rows read from  InnoDB  tables belonging to system-created schemas. The number of times output from the  SHOW ENGINE INNODB STATUS  statement has been truncated. The number of active undo tablespaces. Includes both implicit ( InnoDB -created) and explicit (user- created) undo tablespaces. For information about undo tablespaces, see Section 15.6.3.4, “Undo Tablespaces” . The number of user-created undo tablespaces. For information about undo tablespaces, see Section 15.6.3.4, “Undo Tablespaces” . The number of undo tablespaces created by  InnoDB . Two default undo tablespaces are created by  InnoDB  when the MySQL instance is initialized. For information about undo tablespaces, see Section 15.6.3.4, “Undo Tablespaces” . The total number of undo tablespaces. Includes both implicit ( InnoDB -created) and explicit (user- created) undo tablespaces, active and inactive. For information about undo tablespaces, see Section 15.6.3.4, “Undo Tablespaces” . The number of key blocks in the  MyISAM  key cache that have changed but have not yet been flushed to disk. 960 • Key_blocks_unused • Key_blocks_not_flushed • Innodb_undo_tablespaces_total • Innodb_undo_tablespaces_implicit • Innodb_undo_tablespaces_explicit • Innodb_undo_tablespaces_active • Innodb_truncated_status_writes • Innodb_system_rows_read • Innodb_system_rows_inserted • Innodb_system_rows_deleted • Innodb_rows_updated • Innodb_rows_read • Innodb_rows_inserted