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SET default_storage_engine=InnoDB;
SELECT @save_instrument_enabled := ENABLED
, @save_instrument_timed := TIMED
FROM performance_schema.setup_instruments
WHERE NAME = 'wait/lock/table/sql/handler';
@save_instrument_enabled := ENABLED @save_instrument_timed := TIMED
YES YES
SELECT @save_consumer_enabled := ENABLED
FROM performance_schema.setup_consumers
WHERE NAME = 'events_waits_current';
@save_consumer_enabled := ENABLED
YES
UPDATE performance_schema.setup_instruments
SET ENABLED = 'YES', TIMED = 'YES'
WHERE NAME = 'wait/lock/table/sql/handler';
UPDATE performance_schema.setup_consumers
SET ENABLED = 'YES'
WHERE NAME = 'events_waits_current';
CREATE TABLE t1 (id1 INT(11), col1 VARCHAR (200));
INSERT INTO t1 VALUES (1, 'aa');
INSERT INTO t1 VALUES (2, 'bb');
connect con1,localhost,root,,test;
connect con2,localhost,root,,test;
connection con1;
START TRANSACTION;
connection con2;
START TRANSACTION;
SELECT id1 FROM t1 WHERE id1=1 FOR UPDATE;
connection default;
SELECT event_name FROM performance_schema.events_waits_current
WHERE event_name LIKE '%wait/lock/table/sql/handler%';
event_name
UPDATE performance_schema.setup_instruments
SET ENABLED = @save_instrument_enabled, TIMED = @save_instrument_timed
WHERE NAME = 'wait/lock/table/sql/handler';
UPDATE performance_schema.setup_consumers
SET ENABLED = @save_consumer_enabled
WHERE NAME = 'events_waits_current';
disconnect con1;
disconnect con2;
DROP TABLE t1;
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