Performance Schema Setup Tables • OBJECT_SCHEMA • OBJECT_NAME • ENABLED • TIMED The name of the instrumented object. This should be a literal name, or  ’%’  to mean “any object.” The schema that contains the object. This should be a literal name, or  ’%’  to mean “any schema.” Whether events for the object are instrumented. The value is  YES  or  NO . This column can be modified. Whether events for the object are timed. This column can be modified. The  setup_objects  table has these indexes: •Index on ( OBJECT_TYPE ,  OBJECT_SCHEMA ,  OBJECT_NAME ) TRUNCATE TABLE  is permitted for the  setup_objects  table. It removes the rows. 27.12.2.5 The setup_threads Table The  setup_threads  table lists instrumented thread classes. It exposes thread class names and attributes: mysql>  SELECT * FROM performance_schema.setup_threads\G *************************** 1. row *************************** NAME: thread/performance_schema/setup ENABLED: YES HISTORY: YES PROPERTIES: singleton VOLATILITY: 0 DOCUMENTATION: NULL ... *************************** 4. row *************************** NAME: thread/sql/main ENABLED: YES HISTORY: YES PROPERTIES: singleton VOLATILITY: 0 DOCUMENTATION: NULL *************************** 5. row *************************** NAME: thread/sql/one_connection ENABLED: YES HISTORY: YES PROPERTIES: user VOLATILITY: 0 DOCUMENTATION: NULL ... *************************** 10. row *************************** NAME: thread/sql/event_scheduler ENABLED: YES HISTORY: YES PROPERTIES: singleton VOLATILITY: 0 DOCUMENTATION: NULL The  setup_threads  table has these columns: 4951 • NAME