SET @start_value = @@GLOBAL.innodb_sched_priority_io;
SELECT @@GLOBAL.innodb_sched_priority_io;
@@GLOBAL.innodb_sched_priority_io
19
SELECT @@SESSION.innodb_sched_priority_io;
ERROR HY000: Variable 'innodb_sched_priority_io' is a GLOBAL variable
SET GLOBAL innodb_sched_priority_io=19;
SELECT @@GLOBAL.innodb_sched_priority_io;
@@GLOBAL.innodb_sched_priority_io
19
SET GLOBAL innodb_sched_priority_io=5;
SELECT @@GLOBAL.innodb_sched_priority_io;
@@GLOBAL.innodb_sched_priority_io
5
SET GLOBAL innodb_sched_priority_io=0;
SELECT @@GLOBAL.innodb_sched_priority_io;
@@GLOBAL.innodb_sched_priority_io
0
SET GLOBAL innodb_sched_priority_io=-1;
Warnings:
Warning	1292	Truncated incorrect innodb_sched_priority_io value: '-1'
SELECT @@GLOBAL.innodb_sched_priority_io;
@@GLOBAL.innodb_sched_priority_io
0
SET GLOBAL innodb_sched_priority_io=1.1;
ERROR 42000: Incorrect argument type to variable 'innodb_sched_priority_io'
SET GLOBAL innodb_sched_priority_io=1e1;
ERROR 42000: Incorrect argument type to variable 'innodb_sched_priority_io'
SET GLOBAL innodb_sched_priority_io='foo';
ERROR 42000: Incorrect argument type to variable 'innodb_sched_priority_io'