SET @start_global_value = @@global.innodb_thread_sleep_delay;
SELECT @start_global_value;
@start_global_value
10000
Valid values are zero or above
select @@global.innodb_thread_sleep_delay >=0;
@@global.innodb_thread_sleep_delay >=0
1
select @@global.innodb_thread_sleep_delay;
@@global.innodb_thread_sleep_delay
10000
select @@session.innodb_thread_sleep_delay;
ERROR HY000: Variable 'innodb_thread_sleep_delay' is a GLOBAL variable
show global variables like 'innodb_thread_sleep_delay';
Variable_name	Value
innodb_thread_sleep_delay	10000
show session variables like 'innodb_thread_sleep_delay';
Variable_name	Value
innodb_thread_sleep_delay	10000
select * from information_schema.global_variables where variable_name='innodb_thread_sleep_delay';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_THREAD_SLEEP_DELAY	10000
select * from information_schema.session_variables where variable_name='innodb_thread_sleep_delay';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_THREAD_SLEEP_DELAY	10000
set global innodb_thread_sleep_delay=10;
select @@global.innodb_thread_sleep_delay;
@@global.innodb_thread_sleep_delay
10
select * from information_schema.global_variables where variable_name='innodb_thread_sleep_delay';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_THREAD_SLEEP_DELAY	10
select * from information_schema.session_variables where variable_name='innodb_thread_sleep_delay';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_THREAD_SLEEP_DELAY	10
set session innodb_thread_sleep_delay=1;
ERROR HY000: Variable 'innodb_thread_sleep_delay' is a GLOBAL variable and should be set with SET GLOBAL
set global innodb_thread_sleep_delay=1.1;
ERROR 42000: Incorrect argument type to variable 'innodb_thread_sleep_delay'
set global innodb_thread_sleep_delay=1e1;
ERROR 42000: Incorrect argument type to variable 'innodb_thread_sleep_delay'
set global innodb_thread_sleep_delay="foo";
ERROR 42000: Incorrect argument type to variable 'innodb_thread_sleep_delay'
set global innodb_thread_sleep_delay=18446744073709551616;
ERROR 42000: Incorrect argument type to variable 'innodb_thread_sleep_delay'
set global innodb_thread_sleep_delay=-7;
Warnings:
Warning	1292	Truncated incorrect innodb_thread_sleep_delay value: '-7'
select @@global.innodb_thread_sleep_delay;
@@global.innodb_thread_sleep_delay
0
select * from information_schema.global_variables where variable_name='innodb_thread_sleep_delay';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_THREAD_SLEEP_DELAY	0
set global innodb_thread_sleep_delay=0;
select @@global.innodb_thread_sleep_delay;
@@global.innodb_thread_sleep_delay
0
set global innodb_thread_sleep_delay=1000;
select @@global.innodb_thread_sleep_delay;
@@global.innodb_thread_sleep_delay
1000
set global innodb_thread_sleep_delay=1000000;
select @@global.innodb_thread_sleep_delay;
@@global.innodb_thread_sleep_delay
1000000
set global innodb_thread_sleep_delay=1000001;
Warnings:
Warning	1292	Truncated incorrect innodb_thread_sleep_delay value: '1000001'
select @@global.innodb_thread_sleep_delay;
@@global.innodb_thread_sleep_delay
1000000
set global innodb_thread_sleep_delay=4294967295;
Warnings:
Warning	1292	Truncated incorrect innodb_thread_sleep_delay value: '4294967295'
select @@global.innodb_thread_sleep_delay;
@@global.innodb_thread_sleep_delay
1000000
set global innodb_thread_sleep_delay=555;
select @@global.innodb_thread_sleep_delay;
@@global.innodb_thread_sleep_delay
555
SET @@global.innodb_thread_sleep_delay = @start_global_value;
SELECT @@global.innodb_thread_sleep_delay;
@@global.innodb_thread_sleep_delay
10000
