SELECT @@GLOBAL.innodb_use_sys_malloc; @@GLOBAL.innodb_use_sys_malloc 1 1 Expected SET @@GLOBAL.innodb_use_sys_malloc=0; ERROR HY000: Variable 'innodb_use_sys_malloc' is a read only variable Expected error 'Read only variable' SELECT @@GLOBAL.innodb_use_sys_malloc; @@GLOBAL.innodb_use_sys_malloc 1 1 Expected drop table if exists t1; create table t1(a int not null) engine=innodb DEFAULT CHARSET=latin1; insert into t1 values (1),(2),(3),(4),(5),(6),(7); select * from t1; a 1 2 3 4 5 6 7 drop table t1; SELECT @@GLOBAL.innodb_use_sys_malloc; @@GLOBAL.innodb_use_sys_malloc 1 1 Expected SET @@GLOBAL.innodb_use_sys_malloc=0; ERROR HY000: Variable 'innodb_use_sys_malloc' is a read only variable Expected error 'Read only variable' SELECT @@GLOBAL.innodb_use_sys_malloc; @@GLOBAL.innodb_use_sys_malloc 1 1 Expected drop table if exists t1; create table t1(a int not null) engine=innodb DEFAULT CHARSET=latin1; insert into t1 values (1),(2),(3),(4),(5),(6),(7); select * from t1; a 1 2 3 4 5 6 7 drop table t1;