1SELECT @@global.innodb_encrypt_online_alter_logs; 2@@global.innodb_encrypt_online_alter_logs 30 4SET GLOBAL innodb_encrypt_online_alter_logs = ON; 5ERROR HY000: Variable 'innodb_encrypt_online_alter_logs' is a read only variable 6Expected error 'read only variable' 7SET GLOBAL innodb_encrypt_online_alter_logs = OFF; 8ERROR HY000: Variable 'innodb_encrypt_online_alter_logs' is a read only variable 9Expected error 'read only variable' 10SET GLOBAL innodb_encrypt_online_alter_logs = "ENABLE"; 11ERROR HY000: Variable 'innodb_encrypt_online_alter_logs' is a read only variable 12