Description of overhead displayed in phpmyadmin

Description of overhead in phpmyadmin & nbsp; in phpmyadmin, if there is a column in The myisam table, phpmyadmin displays overhead, & nbsp; in fact, when the data in the table is deleted, some space will be retained and will not be released, which will be used for new records. it is recommended that when the value is too large, it should be worth considering using optimization for debugging, that is, the meaning of overhead shown in & nbsp; & nbsp phpmyadmin
In phpmyadmin, if the myisam table is found, one column is displayed in phpmyadmin.
Overhead,
In fact, when the data in the table is deleted, some space will be retained and will not be released, which will be used for new records. it is recommended that when the value is too large, optimization should be considered for debugging, that is
OPTIMIZE table table_name;