dstat 是一款比较全面的性能监控工具，是排查服务器负载异常的利器！

dstat的安装

dstat的安装在这里介绍三种方式

• 使用"绿色版"安装

  wget http://dstat.sourcearchive.com/downloads/0.7.0/dstat_0.7.0.orig.tar.gz
  tar -xvzf dstat_0.7.0.orig.tar.gz
  cd dstat-0.7.0.orig/
  #使用以下方式即可使用dstat
  ./dstat -V

• 使用rpm安装

  wget http://mirror.centos.org/centos/6/os/i386/Packages/dstat-0.7.0-2.el6.noarch.rpm
  rpm -ivh dstat-0.7.0-2.el6.noarch.rpm
  #直接在系统中调用dstat即可
  dstat -V

• 使用yum安装

yum install dstat

dstat的使用

dstat命令支持的参数这里就不再赘述啦，以下介绍一下个人比较常用的两种参数

1. dstat -tcdrlmn --top-cpu --top=mem #查看时间、CPU、磁盘读写、IO、负载、内存、网络、最高的CPU占用和最高的内存占用

   ----system---- ----total-cpu-usage---- -dsk/total- --io/total- ---load-avg--- ------memory-usage----- -net/total- -most-expensive- --most-expensive-
   date/time   |usr sys idl wai hiq siq| read  writ| read  writ| 1m   5m  15m | used  buff  cach  free| recv  send|  cpu process   |  memory process 
   19-11 21:49:25|  0   0 100   0   0   0|1055B 1810B|0.02  0.07 |0.02 0.01    0| 236M  131M 2961M 4527M|   0     0 |kipmi0       0.0|sshd: root@p4488k
   19-11 21:49:26|  0   0 100   0   0   0|   0     0 |   0     0 |0.02 0.01    0| 236M  131M 2961M 4527M| 398B 1532B|                |sshd: root@p4488k
   19-11 21:49:27|  0   0 100   0   0   0|   0     0 |   0     0 |0.02 0.01    0| 236M  131M 2961M 4527M| 352B  542B|                |sshd: root@p4488k
   19-11 21:49:28|  0   0 100   0   0   0|   0     0 |   0     0 |0.02 0.01    0| 236M  131M 2961M 4527M| 850B  542B|                |sshd: root@p4488k
   19-11 21:49:29|  0   0 100   0   0   0|   0     0 |   0     0 |0.02 0.01    0| 236M  131M 2961M 4527M| 256B  542B|                |sshd: root@p4488k

2. dstat -cl -C 0,1,2,3,4,5,6,7 --top-cpu #查看8颗核心，每颗核心的使用情况和CPU使用情况

   -------cpu0-usage--------------cpu1-usage--------------cpu2-usage--------------cpu3-usage--------------cpu4-usage--------------cpu5-usage--------------cpu6-usage--------------cpu7-usage------ ---load-avg--- -most-expensive-
   usr sys idl wai hiq siq:usr sys idl wai hiq siq:usr sys idl wai hiq siq:usr sys idl wai hiq siq:usr sys idl wai hiq siq:usr sys idl wai hiq siq:usr sys idl wai hiq siq:usr sys idl wai hiq siq| 1m   5m  15m |  cpu process   
   0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0|0.07 0.02    0|kipmi0       0.0
   0   0 100   0   0   0:  0   0 100   0   0   0:  0   1  99   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0|0.07 0.02    0|                
   0   0 100   0   0   0:  0   0 100   0   0   0:  1   1  98   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0|0.07 0.02    0|kipmi0       0.1
   0   1  99   0   0   0:  0   0 100   0   0   0:  2   0  98   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0|0.07 0.02    0|events/3     0.1
   0   0 100   0   0   0:  0   0 100   0   0   0:  1   1  98   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0|0.07 0.02    0|                
   0   0 100   0   0   0:  0   0 100   0   0   0:  1   0  99   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0:  0   0 100   0   0   0|0.07 0.02    0|kipmi0       0.1