mysql中 repair table

在mysql中repair table xxxxx;提示mysql> repair table recordTbl;
+-----------------+--------+----------+----------------------------------------------+
| Table           | Op     | Msg_type | Msg_text                                     |
+-----------------+--------+----------+----------------------------------------------+
| xxxxx           | repair | error    | 28 when fixing table                         |
| xxxxx           | repair | warning  | Number of rows changed from 328959 to 536475 |
| xxxxx           | repair | status   | OK                                           |
+-----------------+--------+----------+----------------------------------------------+
3 rows in set (1 min 39.06 sec)前2行什么意思 谢谢！