I've change as bellow:
mysql> optimize table member.user2;
+--------------+----------+----------+----------+
| Table | Op | Msg_type | Msg_text |
+--------------+----------+----------+----------+
| member.user2 | optimize | status | OK |
+--------------+----------+----------+----------+
1 row in set (4.20 sec)
mysql> select
table_name,engine,round((data_length+index_length)/1024/1024,2) from
information_schema.tables where table_name='user2';
+------------+------------+-----------------------------------------------+
| table_name | engine | round((data_length+index_length)/1024/1024,2) |
+------------+------------+-----------------------------------------------+
| user2 | MyISAM | 479.44 |
| user2 | NDBCLUSTER | 259.84 |
+------------+------------+-----------------------------------------------+
2 rows in set (0.01 sec)
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