标签：discount setting thread amount tables
死锁信息如下：
2015-06-15 22:23:18 7f0266772700
*** (1) TRANSACTION:
TRANSACTION 1834696957, ACTIVE 0 sec setting auto-inc lock
mysql tables in use 2, locked 2
LOCK WAIT 4 lock struct(s), heap size 1184, 1 row lock(s), undo log entries 1
MySQL thread id 1008989, OS thread handle 0x7f0265de0700, query id 1925131733 127.0.0.1 huanghualiang Sending data
INSERT LOW_PRIORITY IGNORE INTO `newmall`.`_cash_xxx_new` (`id`, `type`, `name`, `discount`, `amount`, `begintime`, `endtime`, `userid`, `realname`, `code`, `releaseuserid`, `releaseorderid`, `orderid`, `status`, `packetid`, `deleted`, `createtime`, `updatetime`, `openid`, `headimgurl`) SELECT `id`, `type`, `name`, `discount`, `amount`, `begintime`, `endtime`, `userid`, `realname`, `code`, `releaseuserid`, `releaseorderid`, `orderid`, `status`, `packetid`, `deleted`, `createtime`, `updatetime`, `openid`, `headimgurl` FROM `newmall`.`cash_xxx` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= ‘168256‘)) AND ((`id` <= ‘174595‘)) LOCK IN SHARE MODE /*pt-online-schema-change 17123 copy nibble*/
*** (1) WAITING FOR THIS LOCK TO BE GRANTED:
TABLE LOCK table `newmall`.`_cash_xxx_new` trx id 1834696957 lock mode AUTO-INC waiting
*** (2) TRANSACTION:
TRANSACTION 1834696069, ACTIVE 1 sec fetching rows, thread declared inside InnoDB 2131
mysql tables in use 2, locked 2
1580 lock struct(s), heap size 161320, 3 row lock(s), undo log entries 2
MySQL thread id 1007462, OS thread handle 0x7f0266772700, query id 1925130797 10.162.216.179 xm_mall closing tables
update `cash_xxx` set status = 2 where orderId = 3271393
*** (2) HOLDS THE LOCK(S):
TABLE LOCK table `newmall`.`_cash_xxx_new` trx id 1834696069 lock mode AUTO-INC
*** (2) WAITING FOR THIS LOCK TO BE GRANTED:
RECORD LOCKS space id 11019 page no 3462 n bits 184 index `PRIMARY` of table `newmall`.`cash_xxx` trx id 1834696069 lock_mode X locks rec but not gap waiting
*** WE ROLL BACK TRANSACTION (1)
事务1: INSERT LOW_PRIORITY IGNORE INTO `newmall`.`_cash_xxx_new` ....... select ... FROM `newmall`.`cash_xxx` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= ‘168256‘)) AND ((`id` <= ‘174595‘)) LOCK IN SHARE MODE;
wait for： _cash_xxx_new 自增主键表级别锁
hold： cash_xxx 表的S锁
事务2:update `cash_xxx` set status = 2 where orderId = 3271393
wait for：cash_xxx 表的X锁
hold： _cash_xxx_new 的自增锁 （这里是因为pt-online-schema-change 触发器把update 转成replace into 新表）
最后回滚了事务1。
本文出自 “My DBA life” 博客，请务必保留此出处http://huanghualiang.blog.51cto.com/6782683/1662474
pt-online-schema-change 修改字段属性产生死锁
标签：discount setting thread amount tables
原文地址：http://huanghualiang.blog.51cto.com/6782683/1662474
