select @@global.innodb_linux_aio;
@@global.innodb_linux_aio
auto
select @@session.innodb_linux_aio;
ERROR HY000: Variable 'innodb_linux_aio' is a GLOBAL variable
show global variables like 'innodb_linux_aio';
Variable_name	Value
innodb_linux_aio	auto
show session variables like 'innodb_linux_aio';
Variable_name	Value
innodb_linux_aio	auto
select * from information_schema.global_variables where variable_name='innodb_linux_aio';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_LINUX_AIO	auto
select * from information_schema.session_variables where variable_name='innodb_linux_aio';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_LINUX_AIO	auto
set global innodb_linux_aio='auto';
ERROR HY000: Variable 'innodb_linux_aio' is a read only variable
set session innodb_linux_aio='aio';
ERROR HY000: Variable 'innodb_linux_aio' is a read only variable