Mysql自带查询阻塞语句
Posted QinXiao.Shou
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select r.trx_id waiting_trx_id, r.trx_mysql_thread_Id waiting_thread, r.trx_query waiting_query, b.trx_id blocking_trx_id, b.trx_mysql_thread_id blocking_thread, b.trx_query blocking_query from information_schema.innodb_lock_waits w inner join information_schema.innodb_trx b on b.trx_id = w.blocking_trx_id inner join information_schema.innodb_trx r on r.trx_id = w.requesting_trx_id;
比较完整的:
SELECT p2.`HOST` 被阻塞方host, p2.`USER` 被阻塞方用户, r.trx_id 被阻塞方事务id, r.trx_mysql_thread_id 被阻塞方线程号, TIMESTAMPDIFF( SECOND, r.trx_wait_started, CURRENT_TIMESTAMP ) 等待时间, r.trx_query 被阻塞的查询, l.lock_table 阻塞方锁住的表, m.`lock_mode` 被阻塞方的锁模式, m.`lock_type` "被阻塞方的锁类型(表锁还是行锁)", m.`lock_index` 被阻塞方锁住的索引, m.`lock_space` 被阻塞方锁对象的space_id, m.lock_page 被阻塞方事务锁定页的数量, m.lock_rec 被阻塞方事务锁定行的数量, m.lock_data 被阻塞方事务锁定记录的主键值, p.`HOST` 阻塞方主机, p.`USER` 阻塞方用户, b.trx_id 阻塞方事务id, b.trx_mysql_thread_id 阻塞方线程号, b.trx_query 阻塞方查询, l.`lock_mode` 阻塞方的锁模式, l.`lock_type` "阻塞方的锁类型(表锁还是行锁)", l.`lock_index` 阻塞方锁住的索引, l.`lock_space` 阻塞方锁对象的space_id, l.lock_page 阻塞方事务锁定页的数量, l.lock_rec 阻塞方事务锁定行的数量, l.lock_data 阻塞方事务锁定记录的主键值, IF (p.COMMAND = \'Sleep\', CONCAT(p.TIME,\' 秒\'), 0) 阻塞方事务空闲的时间 FROM information_schema.INNODB_LOCK_WAITS w INNER JOIN information_schema.INNODB_TRX b ON b.trx_id = w.blocking_trx_id INNER JOIN information_schema.INNODB_TRX r ON r.trx_id = w.requesting_trx_id INNER JOIN information_schema.INNODB_LOCKS l ON w.blocking_lock_id = l.lock_id AND l.`lock_trx_id`=b.`trx_id` INNER JOIN information_schema.INNODB_LOCKS m ON m.`lock_id`=w.`requested_lock_id` AND m.`lock_trx_id`=r.`trx_id` INNER JOIN information_schema. PROCESSLIST p ON p.ID = b.trx_mysql_thread_id INNER JOIN information_schema. PROCESSLIST p2 ON p2.ID = r.trx_mysql_thread_id ORDER BY 等待时间 DESC \\G;
没有阻塞的情况:
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