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SET @start_io_capacity = @@global.innodb_io_capacity;
SELECT @start_io_capacity;
@start_io_capacity
200
SET @start_max_io_capacity = @@global.innodb_io_capacity_max;
SELECT @start_max_io_capacity;
@start_max_io_capacity
2000
Valid value 100 or more
select @@global.innodb_io_capacity > 99;
@@global.innodb_io_capacity > 99
1
select @@global.innodb_io_capacity;
@@global.innodb_io_capacity
200
select @@session.innodb_io_capacity;
ERROR HY000: Variable 'innodb_io_capacity' is a GLOBAL variable
show global variables like 'innodb_io_capacity';
Variable_name Value
innodb_io_capacity 200
show session variables like 'innodb_io_capacity';
Variable_name Value
innodb_io_capacity 200
select * from information_schema.global_variables where variable_name='innodb_io_capacity';
VARIABLE_NAME VARIABLE_VALUE
INNODB_IO_CAPACITY 200
select * from information_schema.session_variables where variable_name='innodb_io_capacity';
VARIABLE_NAME VARIABLE_VALUE
INNODB_IO_CAPACITY 200
set global innodb_io_capacity=123;
select @@global.innodb_io_capacity;
@@global.innodb_io_capacity
123
select * from information_schema.global_variables where variable_name='innodb_io_capacity';
VARIABLE_NAME VARIABLE_VALUE
INNODB_IO_CAPACITY 123
select * from information_schema.session_variables where variable_name='innodb_io_capacity';
VARIABLE_NAME VARIABLE_VALUE
INNODB_IO_CAPACITY 123
set session innodb_io_capacity=233;
ERROR HY000: Variable 'innodb_io_capacity' is a GLOBAL variable and should be set with SET GLOBAL
set global innodb_io_capacity=1.1;
ERROR 42000: Incorrect argument type to variable 'innodb_io_capacity'
set global innodb_io_capacity=1e1;
ERROR 42000: Incorrect argument type to variable 'innodb_io_capacity'
set global innodb_io_capacity="foo";
ERROR 42000: Incorrect argument type to variable 'innodb_io_capacity'
set global innodb_io_capacity=7;
Warnings:
Warning 1292 Truncated incorrect innodb_io_capacity value: '7'
select @@global.innodb_io_capacity;
@@global.innodb_io_capacity
100
select * from information_schema.global_variables where variable_name='innodb_io_capacity';
VARIABLE_NAME VARIABLE_VALUE
INNODB_IO_CAPACITY 100
set global innodb_io_capacity=-7;
Warnings:
Warning 1292 Truncated incorrect innodb_io_capacity value: '-7'
select @@global.innodb_io_capacity;
@@global.innodb_io_capacity
100
select * from information_schema.global_variables where variable_name='innodb_io_capacity';
VARIABLE_NAME VARIABLE_VALUE
INNODB_IO_CAPACITY 100
set global innodb_io_capacity=100;
select @@global.innodb_io_capacity;
@@global.innodb_io_capacity
100
set global innodb_io_capacity=@start_max_io_capacity;
select @@global.innodb_io_capacity;
@@global.innodb_io_capacity
2000
set global innodb_io_capacity=@start_max_io_capacity + 1;
Warnings:
Warning 1210 innodb_io_capacity cannot be set higher than innodb_io_capacity_max.
Warning 1210 Setting innodb_io_capacity to 2000
select @@global.innodb_io_capacity;
@@global.innodb_io_capacity
2000
SET @@global.innodb_io_capacity = @start_io_capacity;
SELECT @@global.innodb_io_capacity;
@@global.innodb_io_capacity
200
SET @@global.innodb_io_capacity_max = @start_max_io_capacity;
SELECT @@global.innodb_io_capacity_max;
@@global.innodb_io_capacity_max
2000
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