Home Database Mysql Tutorial myperf 功能介绍之 “top”

myperf 功能介绍之 “top”

Jun 07, 2016 pm 04:33 PM
top introduce Function

自上次 对 myperf 作了一个基本的介绍 之后,反响不错,就准备再针对 myperf 的 3 个模式分别说明一下。 之前已经说明,myperf 有三个mode(功能模式),分别为: top, snap, report。第一个mode比较独立,后2个mode相辅相成。今天这里就先介绍一下 myperf

自上次 对 myperf 作了一个基本的介绍 之后,反响不错,就准备再针对 myperf 的 3 个模式分别说明一下。

之前已经说明,myperf 有三个mode(功能模式),分别为: top, snap, report。第一个mode比较独立,后2个mode相辅相成。今天这里就先介绍一下 myperf 的第一个mode:“top” 。

简单来说,“top” mode其实就是一个类似于我们 Linux/Unix 下最常使用的基本的性能查看程序 top 一样,实时刷新展示数据库当前的一些比较重要的性能指标。

myperf 默认就是 “top” mode,我们可以通过执行 “myperf -h” 来看看程序的帮助内容:

myperf 几乎每一项参数都可以记录在配置文件中,唯一的例外就是当使用配置文件的时候,我们还需要一个参数告知配置文件的位置。

“top” mode 执行过程必须要能够连接到数据库,才能获取到数据库中的一些实时性能数据。可以通过命令行参数或者是配置文件的方式指定数据库连接参数:

  1. 命令行参数方式:

    myperf -u username -p password -H host -i interval -m mode

    如果连接端口不是3306,还需要通过 -P 参数指定数据库监听端口

    注:默认情况下是不会显示当前正在执行的SQL内容的,可以通过 -s 参数开启该功能。如果是MySQL5.5 还可以通过 -e 参数选项开启event的一些信息

  2. 配置文件方式:

    myperf -c configfile

    如果选择使用配置文件的方式,则可以通过 -c 参数指定配置文件位置,并将其他参数都记录在配置文件中的方式来执行。

    注:配置文件中的参数项名称都使用长名称

BTW:经历了2个星期才完成这么一个简单的说明,是自己真没有时间还是只是自己最近的惰性问题?

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