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select @@global.mutex_deadlock_detector;
@@global.mutex_deadlock_detector
1
select @@session.mutex_deadlock_detector;
ERROR HY000: Variable 'mutex_deadlock_detector' is a GLOBAL variable
show global variables like 'mutex_deadlock_detector';
Variable_name Value
mutex_deadlock_detector ON
show session variables like 'mutex_deadlock_detector';
Variable_name Value
mutex_deadlock_detector ON
select * from information_schema.global_variables where variable_name='mutex_deadlock_detector';
VARIABLE_NAME VARIABLE_VALUE
MUTEX_DEADLOCK_DETECTOR ON
select * from information_schema.session_variables where variable_name='mutex_deadlock_detector';
VARIABLE_NAME VARIABLE_VALUE
MUTEX_DEADLOCK_DETECTOR ON
set global mutex_deadlock_detector=1;
ERROR HY000: Variable 'mutex_deadlock_detector' is a read only variable
set session mutex_deadlock_detector=1;
ERROR HY000: Variable 'mutex_deadlock_detector' is a read only variable
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