DROP TABLE IF EXISTS t1;
SET autocommit=0;
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
SHOW GLOBAL VARIABLES LIKE 'innodb_kill_idle_transaction';
Variable_name	Value
innodb_kill_idle_transaction	0
SELECT * FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='innodb_kill_idle_transaction';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_KILL_IDLE_TRANSACTION	0
SET GLOBAL innodb_kill_idle_transaction=5;
SHOW GLOBAL VARIABLES LIKE 'innodb_kill_idle_transaction';
Variable_name	Value
innodb_kill_idle_transaction	5
SELECT * FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='innodb_kill_idle_transaction';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_KILL_IDLE_TRANSACTION	5
BEGIN;
INSERT INTO t1 VALUES (1),(2),(3);
COMMIT;
SELECT * FROM t1;
a
1
2
3
### Locking rows. Lock should be released when idle trx is killed.
BEGIN;
SELECT * FROM t1 FOR UPDATE;
a
1
2
3
UPDATE t1 set a=4;
SELECT * FROM t1;
a
4
4
4
DROP TABLE t1;
SET GLOBAL innodb_kill_idle_transaction=0;
SHOW GLOBAL VARIABLES LIKE 'innodb_kill_idle_transaction';
Variable_name	Value
innodb_kill_idle_transaction	0
SELECT * FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='innodb_kill_idle_transaction';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_KILL_IDLE_TRANSACTION	0