CREATE TABLE `t`(`id` INT, PRIMARY KEY(`id`)) ENGINE=InnoDB STATS_PERSISTENT=0;
INSERT INTO t VALUES (1);
SET GLOBAL innodb_monitor_reset = "module_innodb";
BEGIN;
SELECT * FROM t FOR UPDATE;
id
1
connect con1,localhost,root,,;
SET innodb_lock_wait_timeout = 1;
SELECT * FROM t FOR UPDATE;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
disconnect con1;
connection default;
COMMIT;
SELECT variable_value > 100 FROM information_schema.global_status
WHERE LOWER(variable_name) = 'innodb_row_lock_time';
variable_value > 100
1
SELECT variable_value > 100 FROM information_schema.global_status
WHERE LOWER(variable_name) = 'innodb_row_lock_time_max';
variable_value > 100
1
SELECT variable_value > 100 FROM information_schema.global_status
WHERE LOWER(variable_name) = 'innodb_row_lock_time_avg';
variable_value > 100
1
SELECT count_reset > 100 FROM INFORMATION_SCHEMA.INNODB_METRICS
WHERE NAME="lock_row_lock_time";
count_reset > 100
1
SELECT count_reset > 100 FROM INFORMATION_SCHEMA.INNODB_METRICS
WHERE NAME="lock_row_lock_time_max";
count_reset > 100
1
SELECT count_reset > 100 FROM INFORMATION_SCHEMA.INNODB_METRICS
WHERE NAME="lock_row_lock_time_avg";
count_reset > 100
1
DROP TABLE t;
SET GLOBAL innodb_monitor_reset=default;