SELECT * FROM information_schema.innodb_trx 命令是用来查看当前运行的所以事务：
在执行结果中可以看到是否有表锁等待或者死锁，如果有死锁发生，可以通过下面的命令来杀掉当前运行的事务：
KILL 165667 ; KILL 后面的数字指的是 trx_mysql_thread_id 值。
mysql> show status like 'innodb_row_lock_%'; +-------------------------------+-----------+ | Variable_name | Value | +-------------------------------+-----------+ | Innodb_row_lock_current_waits | 2 | | Innodb_row_lock_time | 334377476 | | Innodb_row_lock_time_avg | 50678 | | Innodb_row_lock_time_max | 51974 | | Innodb_row_lock_waits | 6598 | +-------------------------------+-----------+ 解释如下： Innodb_row_lock_current_waits : 当前等待锁的数量 Innodb_row_lock_time : 系统启动到现在，锁定的总时间长度 Innodb_row_lock_time_avg : 每次平均锁定的时间 Innodb_row_lock_time_max : 最长一次锁定时间 Innodb_row_lock_waits : 系统启动到现在总共锁定的次数desc information_schema.innodb_locks; +-------------+---------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------------+---------------------+------+-----+---------+-------+ | lock_id | varchar(81) | NO | | | |#锁ID | lock_trx_id | varchar(18) | NO | | | |#拥有锁的事务ID | lock_mode | varchar(32) | NO | | | |#锁模式 | lock_type | varchar(32) | NO | | | |#锁类型 | lock_table | varchar(1024) | NO | | | |#被锁的表 | lock_index | varchar(1024) | YES | | NULL | |#被锁的索引 | lock_space | bigint(21) unsigned | YES | | NULL | |#被锁的表空间号 | lock_page | bigint(21) unsigned | YES | | NULL | |#被锁的页号 | lock_rec | bigint(21) unsigned | YES | | NULL | |#被锁的记录号 | lock_data | varchar(8192) | YES | | NULL | |#被锁的数据 +-------------+---------------------+------+-----+---------+-------+desc information_schema.innodb_lock_waits; +-------------------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------------------+-------------+------+-----+---------+-------+ | requesting_trx_id | varchar(18) | NO | | | |#请求锁的事务ID | requested_lock_id | varchar(81) | NO | | | |#请求锁的锁ID | blocking_trx_id | varchar(18) | NO | | | |#当前拥有锁的事务ID | blocking_lock_id | varchar(81) | NO | | | |#当前拥有锁的锁ID +-------------------+-------------+------+-----+---------+-------+desc information_schema.innodb_trx; +----------------------------+---------------------+------+-----+---------------------+-------+ | Field | Type | Null | Key | Default | Extra | +----------------------------+---------------------+------+-----+---------------------+-------+ | trx_id | varchar(18) | NO | | | |#事务ID | trx_state | varchar(13) | NO | | | |#事务状态： | trx_started | datetime | NO | | 0000-00-00 00:00:00 ||#事务开始时间； | trx_requested_lock_id | varchar(81) | YES | | NULL ||#innodb_locks.lock_id | trx_wait_started | datetime | YES | | NULL | |#事务开始等待的时间 | trx_weight | bigint(21) unsigned | NO | | 0 | |# | trx_mysql_thread_id | bigint(21) unsigned | NO | | 0 ||#事务线程ID | trx_query | varchar(1024) | YES | | NULL | |#具体SQL语句 | trx_operation_state | varchar(64) | YES | | NULL ||#事务当前操作状态 | trx_tables_in_use | bigint(21) unsigned | NO | | 0 ||#事务中有多少个表被使用 | trx_tables_locked | bigint(21) unsigned | NO |