在重做日志恢复完成并且数据字典动态元数据（srv_dict_metadata）被传输到数据字典表（dict_table_t）对象之前，不允许检查点和推进检查点 LSN。如果在恢复期间或恢复之后（但在数据字典动态元数据传输到数据字典表对象之前）由于此更改导致重做日志空间不足，可能需要进行 innodb_force_recovery 重启，至少从 SRV_FORCE_NO_IBUF_MERGE 设置开始，如果失败，则使用 SRV_FORCE_NO_LOG_REDO 设置。如果在这种情况下 innodb_force_recovery 重启失败，可能需要从备份中恢复。Checkpoints and advancing the checkpoint LSN are not permitted until redo log recovery is complete and data dictionary dynamic metadata (srv_dict_metadata) is transferred to data dictionary table (dict_table_t) objects. Should the redo log run out of space during recovery or after recovery (but before data dictionary dynamic metadata is transferred to data dictionary table objects) as a result of this change, an innodb_force_recovery restart may be required, starting with at least the SRV_FORCE_NO_IBUF_MERGE setting or, in case that fails, the SRV_FORCE_NO_LOG_REDO setting. If an innodb_force_recovery restart fails in this scenario, recovery from backup may be necessary.