[mysql]alter table add COLUMN 对数据库的影响 - V2EX
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cloudzhou

[mysql]alter table add COLUMN 对数据库的影响

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  •   cloudzhou Nov 6, 2013 7070 views
    This topic created in 4555 days ago, the information mentioned may be changed or developed.
    我最近在阿里云的一台机器上，使用了 alter table add COLUMN 去添加一个新的列，这个表只有1k+行，但是这个操作需要非常久的时间，大概一两分钟都没有响应，导致前台也受到影响。

    我知道这样的操作会导致锁表，但是为什么需要这么久的时间，是不是相关的配置不对呢？
  • table
  • alter
  • add
    2 replies    1970-01-01 08:00:00 +08:00
    pythonee
        1
    pythonee  
       Nov 6, 2013
    文档不是说 online ddl 不会锁表的吗
    mahone3297
        2
    mahone3297  
       Nov 6, 2013
    1k+就这么慢，这不科学。。。
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