config root man

#
# Bug#19904003 INNODB_LIMIT_OPTIMISTIC_INSERT_DEBUG=1
# CAUSES INFINITE PAGE SPLIT
#
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;
#
# Bug#25082593 FOREIGN KEY VALIDATION DOESN'T NEED
# TO ACQUIRE GAP LOCK IN READ COMMITTED
#
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);
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
START TRANSACTION;
INSERT INTO t2 VALUES(1, 3);
START TRANSACTION;
INSERT INTO t1 VALUES(2);
SET GLOBAL innodb_limit_optimistic_insert_debug=0;
DROP TABLE t2;
DROP TABLE t1;