config root man

--source include/have_innodb.inc
--source include/have_debug.inc

--echo #
--echo # Bug#19904003 INNODB_LIMIT_OPTIMISTIC_INSERT_DEBUG=1
--echo # CAUSES INFINITE PAGE SPLIT
--echo #

SET GLOBAL innodb_change_buffering_debug=1;
SET GLOBAL innodb_limit_optimistic_insert_debug=1;
CREATE TABLE t1(c1 INT PRIMARY KEY) ENGINE=InnoDB
PARTITION BY HASH (c1) PARTITIONS 15;
DROP TABLE t1;

SET GLOBAL innodb_change_buffering_debug=0;
SET GLOBAL innodb_limit_optimistic_insert_debug=0;

--echo #
--echo # Bug#25082593 FOREIGN KEY VALIDATION DOESN'T NEED
--echo # TO ACQUIRE GAP LOCK IN READ COMMITTED
--echo #

SET GLOBAL innodb_limit_optimistic_insert_debug=2;

CREATE TABLE t1(col1 INT PRIMARY KEY) ENGINE=INNODB;

CREATE TABLE t2(col1 INT PRIMARY KEY, col2 INT NOT NULL,
FOREIGN KEY(col2) REFERENCES t1(col1)) ENGINE=INNODB;

INSERT INTO t1 VALUES(1), (3), (4);

connect (con1,localhost,root);

SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
START TRANSACTION;
INSERT INTO t2 VALUES(1, 3);

connection default;
START TRANSACTION;

INSERT INTO t1 VALUES(2);

disconnect con1;

SET GLOBAL innodb_limit_optimistic_insert_debug=0;

DROP TABLE t2;
DROP TABLE t1;