mysql系统变量专题学习
要深入研究 mysql 那首先对 mysql 的一些系统 / 扩展变量有一定的了解，因为这些变量不仅决定 mysql 一些配置信息，还影响了 mysql 的性能优化提升，其中包括安全、优化、并发、复制等等。 笔者上网查了一下，这些资料有限，以及官网的一个中文文档介绍的内
要深入研究mysql那首先对mysql的一些系统/扩展变量有一定的了解，因为这些变量不仅决定mysql一些配置信息，还影响了mysql的性能优化提升，其中包括安全、优化、并发、复制等等。
笔者上网查了一下，这些资料有限，以及官网的一个中文文档介绍的内容简短(不包括值域，作用域，有些变量压根没翻译只是给...
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