修改表引擎

alert table db1.table1 ENGINE=InnoDB;

查看库中每个表大小

select TABLE_NAME, concat(truncate(data_length/1024/1024,2),' MB') as data_size, concat(truncate(index_length/1024/1024,2),' MB') as index_size from information_schema.tables where TABLE_SCHEMA = 'base_data' order by data_length desc;