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=1;
SHOW GLOBAL VARIABLES LIKE 'innodb_kill_idle_transaction';
Variable_name	Value
innodb_kill_idle_transaction	1
SELECT * FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='innodb_kill_idle_transaction';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_KILL_IDLE_TRANSACTION	1
BEGIN;
INSERT INTO t1 VALUES (1),(2),(3);
COMMIT;
SELECT * FROM t1;
a
1
2
3
BEGIN;
INSERT INTO t1 VALUES (4),(5),(6);
SELECT * FROM t1;
ERROR HY000: MySQL server has gone away
SELECT * FROM t1;
a
1
2
3
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