1select * from performance_schema.mutex_instances limit 1;
2select * from performance_schema.mutex_instances
3where name='FOO';
4insert into performance_schema.mutex_instances
5set name='FOO', object_instance_begin=12;
6ERROR 42000: INSERT command denied to user 'root'@'localhost' for table 'mutex_instances'
7update performance_schema.mutex_instances
8set name='FOO';
9ERROR 42000: UPDATE command denied to user 'root'@'localhost' for table 'mutex_instances'
10delete from performance_schema.mutex_instances
11where name like "wait/%";
12ERROR 42000: DELETE command denied to user 'root'@'localhost' for table 'mutex_instances'
13delete from performance_schema.mutex_instances;
14ERROR 42000: DELETE command denied to user 'root'@'localhost' for table 'mutex_instances'
15LOCK TABLES performance_schema.mutex_instances READ;
16ERROR 42000: SELECT, LOCK TABLES command denied to user 'root'@'localhost' for table 'mutex_instances'
17UNLOCK TABLES;
18LOCK TABLES performance_schema.mutex_instances WRITE;
19ERROR 42000: SELECT, LOCK TABLES command denied to user 'root'@'localhost' for table 'mutex_instances'
20UNLOCK TABLES;
21