SET @start_innodb_max_capacity = @@global.innodb_io_capacity_max;
SELECT @start_innodb_max_capacity;
@start_innodb_max_capacity
2000
SET @start_innodb_capacity = @@global.innodb_io_capacity;
SELECT @start_innodb_capacity;
@start_innodb_capacity
200
Valid value 100 or more
select @@global.innodb_io_capacity_max > 99;
@@global.innodb_io_capacity_max > 99
1
select @@global.innodb_io_capacity_max;
@@global.innodb_io_capacity_max
2000
select @@session.innodb_io_capacity_max;
ERROR HY000: Variable 'innodb_io_capacity_max' is a GLOBAL variable
show global variables like 'innodb_io_capacity_max';
Variable_name	Value
innodb_io_capacity_max	2000
show session variables like 'innodb_io_capacity_max';
Variable_name	Value
innodb_io_capacity_max	2000
select * from information_schema.global_variables where variable_name='innodb_io_capacity_max';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_IO_CAPACITY_MAX	2000
select * from information_schema.session_variables where variable_name='innodb_io_capacity_max';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_IO_CAPACITY_MAX	2000
set global innodb_io_capacity_max=@start_innodb_capacity + 1;
select @@global.innodb_io_capacity_max;
@@global.innodb_io_capacity_max
201
select * from information_schema.global_variables where variable_name='innodb_io_capacity_max';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_IO_CAPACITY_MAX	201
select * from information_schema.session_variables where variable_name='innodb_io_capacity_max';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_IO_CAPACITY_MAX	201
set session innodb_io_capacity_max=444;
ERROR HY000: Variable 'innodb_io_capacity_max' is a GLOBAL variable and should be set with SET GLOBAL
set global innodb_io_capacity_max=1.1;
ERROR 42000: Incorrect argument type to variable 'innodb_io_capacity_max'
set global innodb_io_capacity_max=1e1;
ERROR 42000: Incorrect argument type to variable 'innodb_io_capacity_max'
set global innodb_io_capacity_max="foo";
ERROR 42000: Incorrect argument type to variable 'innodb_io_capacity_max'
set global innodb_io_capacity_max=1000;
set global innodb_io_capacity=500;
set global innodb_io_capacity_max=400;
Warnings:
Warning	1210	Setting innodb_io_capacity_max 400 lower than innodb_io_capacity 500.
Warning	1210	Setting innodb_io_capacity to 400
select @@global.innodb_io_capacity_max;
@@global.innodb_io_capacity_max
400
select @@global.innodb_io_capacity;
@@global.innodb_io_capacity
400
select * from information_schema.global_variables where variable_name='innodb_io_capacity_max';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_IO_CAPACITY_MAX	400
select * from information_schema.global_variables where variable_name='innodb_io_capacity';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_IO_CAPACITY	400
set global innodb_io_capacity_max=1000;
set global innodb_io_capacity=500;
set global innodb_io_capacity=1400;
Warnings:
Warning	1210	Setting innodb_io_capacity to 1400 higher than innodb_io_capacity_max 1000
Warning	1210	Setting innodb_max_io_capacity to 2800
select @@global.innodb_io_capacity_max;
@@global.innodb_io_capacity_max
2800
select @@global.innodb_io_capacity;
@@global.innodb_io_capacity
1400
select * from information_schema.global_variables where variable_name='innodb_io_capacity_max';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_IO_CAPACITY_MAX	2800
select * from information_schema.global_variables where variable_name='innodb_io_capacity';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_IO_CAPACITY	1400
set global innodb_io_capacity=100;
set global innodb_io_capacity_max=100;
select @@global.innodb_io_capacity_max;
@@global.innodb_io_capacity_max
100
SET @@global.innodb_io_capacity_max = @start_innodb_max_capacity;
SELECT @@global.innodb_io_capacity_max;
@@global.innodb_io_capacity_max
2000
SET @@global.innodb_io_capacity = @start_innodb_capacity;
SELECT @@global.innodb_io_capacity;
@@global.innodb_io_capacity
200