select * from performance_schema.FILE_INSTANCES limit 1;FILE_NAME EVENT_NAME OPEN_COUNT# # #select * from performance_schema.FILE_INSTANCESwhere file_name='FOO';FILE_NAME EVENT_NAME OPEN_COUNTinsert into performance_schema.FILE_INSTANCESset file_name='FOO', event_name='BAR', open_count=12;ERROR 42000: INSERT command denied to user 'root'@'localhost' for table 'FILE_INSTANCES'update performance_schema.FILE_INSTANCESset file_name='FOO';ERROR 42000: UPDATE command denied to user 'root'@'localhost' for table 'FILE_INSTANCES'delete from performance_schema.FILE_INSTANCESwhere event_name like "wait/%";ERROR 42000: DELETE command denied to user 'root'@'localhost' for table 'FILE_INSTANCES'delete from performance_schema.FILE_INSTANCES;ERROR 42000: DELETE command denied to user 'root'@'localhost' for table 'FILE_INSTANCES'LOCK TABLES performance_schema.FILE_INSTANCES READ;ERROR 42000: SELECT,LOCK TABL command denied to user 'root'@'localhost' for table 'FILE_INSTANCES'UNLOCK TABLES;LOCK TABLES performance_schema.FILE_INSTANCES WRITE;ERROR 42000: SELECT,LOCK TABL command denied to user 'root'@'localhost' for table 'FILE_INSTANCES'UNLOCK TABLES;