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  • flush tables 好危险啊

    请看图

    +----+------+-----------+------+------------+------+-------------------------+----------------------------------------+
    | Id | User | Host | db | Command | Time | State | Info |
    +----+------+-----------+------+------------+------+-------------------------+----------------------------------------+
    | 1 | root | localhost | test | Query | 78 | User sleep | select sleep(500) , id from my_test1_0 |
    | 9 | root | localhost | NULL | Query | 71 | Waiting for table flush | flush tables |
    | 10 | root | localhost | test | Field List | 24 | Waiting for table flush | |
    | 11 | root | localhost | NULL | Query | 0 | init | show processlist |
    +----+------+-----------+------+------------+------+-------------------------+----------------------------------------+

    如果有个运行时间很长的语句,阻塞了flush tables运行,那么后续的所有语句都会被这个flush tables 所阻塞。

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  • 原文地址:https://www.cnblogs.com/youge-OneSQL/p/4466298.html
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