mysql error:Lock wait timeout exceeded解决

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mysql error:Lock wait timeout exceeded解决_MySQL

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Jun 01, 2016 pm 01:33 PM

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mysql error:Lock wait timeout exceeded

1、锁等待超时。是当前事务在等待其它事务释放锁资源造成的。可以找出锁资源竞争的表和语句，优化你的SQL，创建索引等，如果还是不行，可以适当减少并发线程数。

2、你的事务在等待给某个表加锁时超时了，估计是表正被另的进程锁住一直没有释放。

可以用 SHOW INNODB STATUS/G; 看一下锁的情况。

3、搜索解决之道

在管理节点的[ndbd default]

区加：

TransactionDeadLockDetectionTimeOut=10000（设置为10秒）默认是1200（1.2秒）

4、InnoDB会自动的检测死锁进行回滚，或者终止死锁的情况。

如果参数innodb_table_locks=1并且autocommit=0时，InnoDB会留意表的死锁，和MySQL层面的行级锁。另外，InnoDB不会检测MySQL的Lock Tables命令和其他存储引擎死锁。

你应该设置innodb_lock_wait_timeout来解决这种情况。

innodb_lock_wait_timeout是Innodb放弃行级锁的超时时间。

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