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性能监控之 Linux 命令 top、vmstat、iostat、free、iftop 基础

一、前言 “子曰：“温故而知新，可以为师矣。”-----《论语》二、top 执行命令： top [-] [d] [p] [q] [c] [C] [S] [s] [n] 参数说明： d：指定每两次屏幕信息刷新之间的时间间隔。当然用户可以使用 s 交互命令来改变之。 p：通过指定监控进程 ID 来仅仅...

Linux Performance Monitoring with Vmstat and Iostat Commands

概述Linux-使用vmstat和iostat/iotop命令进行Linux性能监控vmstat和iostat两个命令都适用于所有主要的类unix系统（Linux/unix/FreeBSD/Solaris）。磁盘IO是服务器性能的一个重要指标，下面介绍两个常用的观察IO的命令，iostat我一般用来...

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Linux-(vmstat,iostat,netstat)

vmstat命令 vmstat是Virtual Meomory Statistics（虚拟内存统计）的缩写，可对操作系统的虚拟内存、进程、CPU活动进行监控。他是对系统的整体情况进行统计，不足之处是无法对某个进程进行深入分析。vmstat 工具提供了一种低开销的系统性能...

linux 性能监控命令6——mpstat，vmstat，iostat

1、mpstat mpstat是MultiProcessor Statistics的缩写，是实时系统监控工具。其报告与CPU的一些统计信息，这些信息存放在/proc/stat文件中。在多CPUs系统里，其不但能查看所有CPU的平均状况信息，而且能够查看特定CPU的信息。下面只介绍mpstat与CPU...

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