查看mysql表大小

//先进去MySQL自带管理库：information_schema
//自己的数据库：dbwww58com_kuchecarlib
//自己的表：t_carmodelparamvalue  

mysql> use information_schema;
Database changed
mysql> select data_length,index_length
    -> from tables where
    -> table_schema='dbwww58com_kuchecarlib'
    -> and table_name = 't_carmodelparamvalue';
+-------------+--------------+
| data_length | index_length |
+-------------+--------------+
|   166379520 |    235782144 |
+-------------+--------------+
1 row in set (0.02 sec)  

mysql> select concat(round(sum(data_length/1024/1024),2),'MB') as data_length_MB,
    -> concat(round(sum(index_length/1024/1024),2),'MB') as index_length_MB
    -> from tables where
    -> table_schema='dbwww58com_kuchecarlib'
    -> and table_name = 't_carmodelparamvalue';
+----------------+-----------------+
| data_length_MB | index_length_MB |
+----------------+-----------------+
| 158.67MB       | 224.86MB        |
+----------------+-----------------+
1 row in set (0.03 sec) 

转载：http://blog.csdn.net/partner4java/article/details/7579818