首先delete数据。
mysql> optimize table report;
+------------+----------+----------+---------------------------------------------------------------------------------------+
| Table | Op | Msg_type | Msg_text |
+------------+----------+----------+---------------------------------------------------------------------------------------+
| du.report | optimize | note | Table does not support optimize, doing recreate + analyze instead |
| du.report | optimize | error | Error writing file './du/#sql-3a1_2da46.frm' (Errcode: 28 - No space left on device) |
| du.report | optimize | status | Operation failed |
+------------+----------+----------+---------------------------------------------------------------------------------------+
3 rows in set, 1 warning (0.04 sec)
不支持 optimize。
空间也不足。
mysql> truncate table report;
ERROR 1030 (HY000): Got error 168 from storage engine
释放一点空间，可以truncate表了。
mysql> truncate table report;
Query OK, 0 rows affected (2.82 sec)
释放表占用的磁盘空间：
mysql> alter table report ENGINE='InnoDB';
Query OK, 0 rows affected (11 min 56.05 sec)
Records: 0 Duplicates: 0 Warnings: 0
完成空间释放。