如何检查mysql表碎片化
select TABLE_NAME, TABLE_SCHEMA, Data_free from information_schema.TABLES where TABLE_SCHEMA NOT IN (‘information_schema‘, ‘mysql‘) and Data_Free >0;
+-----------------+--------------+-----------+
| TABLE_NAME | TABLE_SCHEMA | Data_free |
+-----------------+--------------+-----------+
| City | world_innodb | 5242880 |
| City_Copy | world_innodb | 5242880 |
| Country | world_innodb | 5242880 |
| CountryLanguage | world_innodb | 5242880 |
| a | world_innodb | 5242880 |
| t1 | world_innodb | 5242880 |
| t2 | world_innodb | 5242880 |
+-----------------+--------------+-----------+
7 rows in set (0.00 sec)
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