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1.查看所使用到的命令为iostat,centos7没有自带iostat,需要安装一下
2.安装iostat命令
yum -y install sysstat
3.使用iostat命令
iostat
%user:表示用户空间进程使用 CPU 时间的百分比
%nice:表示用户空间进程以降低优先级的方式使用 CPU 时间的百分比
%system:表示内核进程使用 CPU 时间的百分比
%iowait:表示 CPU 等待未完成的 I/O 请求所占用的时间百分比
%steal:表示虚拟化环境中,其他虚拟机运行时占用 CPU 时间的百分比
%idle:表示 CPU 空闲时间的百分比
tps:表示每秒传输的 I/O 请求数量,即 I/O 操作数
kB_read/s:表示每秒读取的数据量,单位为 KB
kB_wrtn/s:表示每秒写入的数据量,单位为 KB
kB_read:表示自系统启动以来读取的总数据量,单位为 KB
kB_wrtn:表示自系统启动以来写入的总数据量,单位为 KB
使用-x命令可以看到更详细的信息
iostat -x
也可以增加一些参数,1为时间间隔1s,3为输出3次
iostat -x 1 3
4.iostat的应用
提取磁盘的io
iostat |grep sda |awk '{print $2}'
根据以上的命令更改一下搭配zabbix使用可实现监控