有时，关系型相关数据库系统的复杂性会把你搞晕，不过幸运的是，使用MySQL工具来管理查询就就可以避免这些复杂性。 在本教程中，
有时，关系型相关数据库系统的复杂性会把你搞晕，不过幸运的是，使用MySQL工具来管理查询就就可以避免这些复杂性。 在本教程中，我将向你们展示 怎样去查找并杀掉任何非法的MySQL查询。
为了浏览当前正在运行的查询，登陆到MySQL终端，然后运行‘show processlist’命令:
首先你应该查看'Time'项，这里记录了进程执行 "做其当做的事情" 操作的秒数。‘command’项处于‘Sleep’ 状态的进程表示其正在等待接受查询，因此，它并没有消耗任何资源。对于其他任何进程而言，‘Time’超过一定的秒数表明出现问题。
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Ubuntu 14.04下安装MySQL
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Ubuntu 12.04 LTS 构建高可用分布式 MySQL 集群
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在上面的例子中，唯一运行的查询是我们的‘show processlist’命令。让我们来看看如果我们有一个写的很烂的查询是怎么样的:
啊哈！现在我们看到有一个查询运行了将近30秒。如果我们不想让它的进程继续运行，可以将它的'Id'传递给kill命令:
(注意 由于我们没有改变任何数据，MySQL总是报告0行被影响。)
明智的使用kill命令能够清除积压的查询。然而，要记住的是，那不是一种永久的方法 - 如果这些查询来自你的程序，你需要去重写它们，，或者将继续看到相同的问题不断出现。
另请参阅关于不同‘命令’的MySQL文档:
via:
译者：hunanchenxingyu 校对：wxy
本文由 LCTT 原创翻译，Linux中国 荣誉推出
本文永久更新链接地址：
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