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SET @start_global_value = @@global.innodb_spin_wait_delay;
SELECT @start_global_value;
@start_global_value
4
Valid values are zero or above
select @@global.innodb_spin_wait_delay >=0;
@@global.innodb_spin_wait_delay >=0
1
select @@global.innodb_spin_wait_delay;
@@global.innodb_spin_wait_delay
4
select @@session.innodb_spin_wait_delay;
ERROR HY000: Variable 'innodb_spin_wait_delay' is a GLOBAL variable
show global variables like 'innodb_spin_wait_delay';
Variable_name Value
innodb_spin_wait_delay 4
show session variables like 'innodb_spin_wait_delay';
Variable_name Value
innodb_spin_wait_delay 4
select * from information_schema.global_variables where variable_name='innodb_spin_wait_delay';
VARIABLE_NAME VARIABLE_VALUE
INNODB_SPIN_WAIT_DELAY 4
select * from information_schema.session_variables where variable_name='innodb_spin_wait_delay';
VARIABLE_NAME VARIABLE_VALUE
INNODB_SPIN_WAIT_DELAY 4
set global innodb_spin_wait_delay=10;
select @@global.innodb_spin_wait_delay;
@@global.innodb_spin_wait_delay
10
select * from information_schema.global_variables where variable_name='innodb_spin_wait_delay';
VARIABLE_NAME VARIABLE_VALUE
INNODB_SPIN_WAIT_DELAY 10
select * from information_schema.session_variables where variable_name='innodb_spin_wait_delay';
VARIABLE_NAME VARIABLE_VALUE
INNODB_SPIN_WAIT_DELAY 10
set session innodb_spin_wait_delay=1;
ERROR HY000: Variable 'innodb_spin_wait_delay' is a GLOBAL variable and should be set with SET GLOBAL
set global innodb_spin_wait_delay=DEFAULT;
select @@global.innodb_spin_wait_delay;
@@global.innodb_spin_wait_delay
4
set global innodb_spin_wait_delay=0;
select @@global.innodb_spin_wait_delay;
@@global.innodb_spin_wait_delay
0
set global innodb_spin_wait_delay=5000;
select @@global.innodb_spin_wait_delay;
@@global.innodb_spin_wait_delay
5000
set global innodb_spin_wait_delay=65535;
Warnings:
Warning 1292 Truncated incorrect innodb_spin_wait_delay value: '65535'
select @@global.innodb_spin_wait_delay;
@@global.innodb_spin_wait_delay
6000
set global innodb_spin_wait_delay=4294967295;
Warnings:
Warning 1292 Truncated incorrect innodb_spin_wait_delay value: '4294967295'
select @@global.innodb_spin_wait_delay;
@@global.innodb_spin_wait_delay
6000
set @@global.innodb_spin_wait_delay = 4294967296;
Warnings:
Warning 1292 Truncated incorrect innodb_spin_wait_delay value: '4294967296'
select @@global.innodb_spin_wait_delay;
@@global.innodb_spin_wait_delay
6000
set @@global.innodb_spin_wait_delay = 12345678901;
Warnings:
Warning 1292 Truncated incorrect innodb_spin_wait_delay value: '12345678901'
select @@global.innodb_spin_wait_delay;
@@global.innodb_spin_wait_delay
6000
set @@global.innodb_spin_wait_delay = 18446744073709551615;
Warnings:
Warning 1292 Truncated incorrect innodb_spin_wait_delay value: '18446744073709551615'
select @@global.innodb_spin_wait_delay;
@@global.innodb_spin_wait_delay
6000
set global innodb_spin_wait_delay=1.1;
ERROR 42000: Incorrect argument type to variable 'innodb_spin_wait_delay'
set global innodb_spin_wait_delay=1e1;
ERROR 42000: Incorrect argument type to variable 'innodb_spin_wait_delay'
set global innodb_spin_wait_delay="foo";
ERROR 42000: Incorrect argument type to variable 'innodb_spin_wait_delay'
set global innodb_spin_wait_delay=' ';
ERROR 42000: Incorrect argument type to variable 'innodb_spin_wait_delay'
select @@global.innodb_spin_wait_delay;
@@global.innodb_spin_wait_delay
6000
set global innodb_spin_wait_delay=" ";
ERROR 42000: Incorrect argument type to variable 'innodb_spin_wait_delay'
select @@global.innodb_spin_wait_delay;
@@global.innodb_spin_wait_delay
6000
set global innodb_spin_wait_delay=-7;
Warnings:
Warning 1292 Truncated incorrect innodb_spin_wait_delay value: '-7'
select @@global.innodb_spin_wait_delay;
@@global.innodb_spin_wait_delay
0
set global innodb_spin_wait_delay=-1024;
Warnings:
Warning 1292 Truncated incorrect innodb_spin_wait_delay value: '-1024'
select @@global.innodb_spin_wait_delay;
@@global.innodb_spin_wait_delay
0
select * from information_schema.global_variables where variable_name='innodb_spin_wait_delay';
VARIABLE_NAME VARIABLE_VALUE
INNODB_SPIN_WAIT_DELAY 0
SET @@global.innodb_spin_wait_delay = @start_global_value;
SELECT @@global.innodb_spin_wait_delay;
@@global.innodb_spin_wait_delay
4
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