CREATE TABLE t1 ( id INT AUTO_INCREMENT PRIMARY KEY, name VARCHAR(100) ) ENGINE=InnoDB AUTO_INCREMENT=99; SET GLOBAL debug="+d,innodb_evict_autoinc_table"; SET GLOBAL innodb_ft_aux_table="test/t1"; ERROR 42000: Variable 'innodb_ft_aux_table' can't be set to the value of 'test/t1' SET GLOBAL debug="-d,innodb_evict_autoinc_table"; INSERT INTO t1(name) VALUES('mysql'); SELECT * FROM t1; id name 99 mysql DROP TABLE t1;