sysstat官网
http://sebastien.godard.pagesperso-orange.fr/

https://github.com/sysstat/sysstat

The sysstat utilities are a collection of performance monitoring tools for Linux. 
These include sar, sadf, mpstat, iostat, tapestat, pidstat, cifsiostat  and sa tools. 

iostat    reports CPU statistics and input/output statistics for block devices and partitions.
mpstat    reports individual or combined processor related statistics.
pidstat   reports statistics for Linux tasks (processes) : I/O, CPU, memory, etc.

yum -y install sysstat


查看安装位置和文件
rpm -ql sysstat



iostat

-c  仅显示cpu信息
-d  仅显示存储设备信息，不可以和-c一起使用
-k  KB   -m MB
-t  显示日期
-p  device | ALL 
device为某个设备或者某个分区， ALL 所有分区和设备的信息
-x 显示扩展状态 

iostat
iostat 2 6
iostat -d -k 2 6
iostat -c
iostat -d -x 
iostat -d -x 2 6



mpstat

Multiprocessor Statistics

mpstat 2 5
cpu汇总信息

mpstat -P ALL 
所有核 （含汇总）

mpstat -P 0
查看cpu0的统计数据




pidstat

pidstat -C java

pidstat -dl

pidstat -drsuwlh

-C     comm Display only tasks whose command name includes the string comm. 
-d     Report I/O statistics (kernels 2.6.20 and later only).
-h     Display all activities horizontally on a single line. This is intended to make it easier to be parsed by other programs.
-l     Display the process command name and all its arguments.
-p { pid [,...] | SELF | ALL }
-r     Report page faults and memory utilization.
-s     Report stack utilization. 
-t     Also display statistics for threads associated with selected tasks.
-u     Report CPU utilization.
-w     Report task switching activity (kernels 2.6.23 and later only).  

-h  列很多时保持 单行输出

 

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