SET @start_global_value = @@global.thread_pool_oversubscribe;
select @@global.thread_pool_oversubscribe;
@@global.thread_pool_oversubscribe
3
select @@session.thread_pool_oversubscribe;
ERROR HY000: Variable 'thread_pool_oversubscribe' is a GLOBAL variable
show global variables like 'thread_pool_oversubscribe';
Variable_name	Value
thread_pool_oversubscribe	3
show session variables like 'thread_pool_oversubscribe';
Variable_name	Value
thread_pool_oversubscribe	3
select * from information_schema.global_variables where variable_name='thread_pool_oversubscribe';
VARIABLE_NAME	VARIABLE_VALUE
THREAD_POOL_OVERSUBSCRIBE	3
select * from information_schema.session_variables where variable_name='thread_pool_oversubscribe';
VARIABLE_NAME	VARIABLE_VALUE
THREAD_POOL_OVERSUBSCRIBE	3
set global thread_pool_oversubscribe=60;
select @@global.thread_pool_oversubscribe;
@@global.thread_pool_oversubscribe
60
set global thread_pool_oversubscribe=1000;
select @@global.thread_pool_oversubscribe;
@@global.thread_pool_oversubscribe
1000
set session thread_pool_oversubscribe=1;
ERROR HY000: Variable 'thread_pool_oversubscribe' is a GLOBAL variable and should be set with SET GLOBAL
set global thread_pool_oversubscribe=1.1;
ERROR 42000: Incorrect argument type to variable 'thread_pool_oversubscribe'
set global thread_pool_oversubscribe=1e1;
ERROR 42000: Incorrect argument type to variable 'thread_pool_oversubscribe'
set global thread_pool_oversubscribe="foo";
ERROR 42000: Incorrect argument type to variable 'thread_pool_oversubscribe'
set global thread_pool_oversubscribe=-1;
Warnings:
Warning	1292	Truncated incorrect thread_pool_oversubscribe value: '-1'
select @@global.thread_pool_oversubscribe;
@@global.thread_pool_oversubscribe
1
set global thread_pool_oversubscribe=10000000000;
Warnings:
Warning	1292	Truncated incorrect thread_pool_oversubscribe value: '10000000000'
select @@global.thread_pool_oversubscribe;
@@global.thread_pool_oversubscribe
1000
set @@global.thread_pool_oversubscribe = @start_global_value;