当我看到db_1的大小时,它只列为4k.但是当我显示db_1的表状态时,我发现根据数据长度,总大小约为3.7 GB.为什么会出现这种差异？另外为什么ibdata1这么大？
drwx------ 2 MysqL MysqL 4.0K Jun 3 08:52 db_1 -rw-r-xr-x 1 MysqL MysqL 22G Jun 3 08:51 ibdata1 drwx------ 2 MysqL MysqL 4.0K Apr 30 22:30 my_DB drwxr-xr-x 2 MysqL dba 8.0K May 1 12:44 MysqL -rw-r-xr-x 1 MysqL root 4.4K Jun 1 14:33 -rw-rw---- 1 MysqL MysqL 5 May 17 18:19 -rw-r-xr-x 1 MysqL MysqL 51K Jun 3 08:41 drwxr-xr-x 2 MysqL dba 4.0K Apr 30 22:29 performance_schema ----------------+---------+ | Name | Engine | Version | Row_format | Rows | Avg_row_length | Data_length | Max_data_length | Index_length | Data_free | Auto_increment | Create_time | Update_time | Check_time | Collation | Checksum | Create_options | Comment | +------------------------------------------------+--------+---------+------------+----------+----------------+-------------+-----------------+--------------+-------------+----------------+---------------------+-------------+------------+-------------------+----------+----------------+---------+ | xxxxxxxxxxxxxxxxxxxxxx | InnoDB | 10 | Compact | 117 | 140 | 16384 | 0 | 0 | 17825792000 | NULL | 2012-05-01 13:24:34 | NULL | NULL | latin1_swedish_ci | NULL | | | | xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx| InnoDB | 10 | Compact | 466203 | 248 | 116015104 | 0 | 0 | 17825792000 | NULL | 2012-05-01 13:31:28 | NULL | NULL | latin1_swedish_ci | NULL | | | | xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx | InnoDB | 10 | Compact | 1028265 | 111 | 114147328 | 0 | 0 | 17825792000 | NULL | 2012-05-01 13:32:36 | NULL | NULL | latin1_swedish_ci | NULL | | | | xxxxxxxxxxxxxxxxxxxxxxxx | InnoDB | 10 | Compact | 1353685 | 98 | 133922816 | 0 | 0 | 17825792000 | NULL | 2012-05-01 13:32:49 | NULL | NULL | latin1_swedish_ci | NULL | | | | xxxxxxxxxxxxxxxxxx | InnoDB | 10 | Compact | 50546 | 52 | 2637824 | 0 | 0 | 17825792000 | NULL | 2012-05-01 13:04:18 | NULL | NULL | latin1_swedish_ci | NULL | | | | xxxxxxxxxxxxxxxxxxxxxx | InnoDB | 10 | Compact | 44281 | 83 | 3686400 | 0 | 0 | 17825792000 | NULL | 2012-05-01 13:19:25 | NULL | NULL | latin1_swedish_ci | NULL | | | | xxxxxxxxxxxxxxxxxxxxxxxxx | InnoDB | 10 | Compact | 5841698 | 124 | 729808896 | 0 | 163397632 | 17825792000 | NULL | 2012-05-01 13:17:29 | NULL | NULL | latin1_swedish_ci | NULL | | | | xxxxxxxxxxxxxxxxxxxxxxxx | InnoDB | 10 | Compact | 52327792 | 60 | 3171942400 | 0 | 0 | 17825792000 | NULL | 2012-05-03 17:09:41 | NULL | NULL | latin1_swedish_ci | NULL | | | +------------------------------------------------+--------+---------+------------+----------+----------------+-------------+-----------------+--------------+-------------+----------------+---------------------+-------------+------------+-------------------+----------+----------------+---------+
