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=" ";
ERROR 42000: Incorrect argument type to variable 'innodb_io_capacity_max'
SET @@global.innodb_io_capacity_max = DEFAULT;
select @@global.innodb_io_capacity_max IN (18446744073709551615,4294967295);
@@global.innodb_io_capacity_max IN (18446744073709551615,4294967295)
1
set global innodb_io_capacity_max=@start_innodb_capacity - 1;
Warnings:
Warning	1210	innodb_io_capacity_max cannot be set lower than innodb_io_capacity.
Warning	1210	Setting innodb_io_capacity_max to 200
select @@global.innodb_io_capacity_max;
@@global.innodb_io_capacity_max
200
select * from information_schema.global_variables where variable_name='innodb_io_capacity_max';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_IO_CAPACITY_MAX	200
set global innodb_io_capacity_max=-7;
Warnings:
Warning	1292	Truncated incorrect innodb_io_capacity_max value: '-7'
Warning	1210	innodb_io_capacity_max cannot be set lower than innodb_io_capacity.
Warning	1210	Setting innodb_io_capacity_max to 200
select @@global.innodb_io_capacity_max;
@@global.innodb_io_capacity_max
200
select * from information_schema.global_variables where variable_name='innodb_io_capacity_max';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_IO_CAPACITY_MAX	200
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
