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如何在不影响生产性能的情况下向超过10 GB的innodb mysql表添加新列？

[英]How to add new columns to over 10 GB innodb mysql table without affecting production performance?

原文 2015-07-01 01:45:32 2 2 mysql/ innodb/ database-deadlocks

I'm straightly trying to add 3 new columns to a innodb mysql table which is over 10GB and is serving (read/write) online. 我直接尝试将3个新列添加到超过10GB的innodb mysql表中，并且正在联机（读取/写入）服务。

I just used ALTER TABLE xxx add column yyy ... as usual. 我只是像往常一样使用ALTER TABLE xxx add column yyy ...

Because of the large data scale, the altering operation is extremely time-consuming(over 10 minutes). 由于数据规模大，更改操作非常耗时（超过10分钟）。

The problem seems to be that it locks the whole table, so that it can not serve while altering. 问题似乎在于，它锁定了整个表，因此在更改时无法使用。

I'm using mysql-5.6.14, which declares to support ADD operation online. 我正在使用mysql-5.6.14，它声明为支持在线ADD操作。

Is it a common issue? 这是常见问题吗？

or 要么

Am I doing something wrong? 难道我做错了什么？

2 个解决方案

I don't see what went wrong. 我看不出出了什么问题。 Suggest you file a bug at bugs.mysql.com. 建议您在bugs.mysql.com上提交错误。

Meanwhile, you could use pt-online-schema-change to do the change with virtually no downtime. 同时，您可以使用pt-online-schema-change进行更改，而几乎没有停机时间。

From https://dev.mysql.com/doc/refman/5.6/en/innodb-create-index-overview.html#innodb-online-ddl-summary-grid 来自https://dev.mysql.com/doc/refman/5.6/en/innodb-create-index-overview.html#innodb-online-ddl-summary-grid

    Concurrent DML is not allowed when adding an auto-increment column.

Are you adding an auto inc column? 您是否要添加汽车公司专栏？

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