sysstat命令--sar工具

sysstat – sar 工具；

sar 工具比较强大，既能收集系统CPU、硬盘、动态数据，也能显示动态显示，更能查看二进制数据文件；sar 的应用比较多，而且也比较复杂，数据更为精确。我们只了解一下常用的内容就行，大多数内容我们了解就行；

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用法：
sar ［参数选项]

-b 通过设备的I/O中断读取设置的吞吐率；
-B Paging statistics
-d Block device statistics
-I { | SUM | ALL | XALL }
Interrupts statistics
-m Power management statistics
-n { [,…] | ALL }

Network statistics
Keywords are:
DEV - Network interfaces
EDEV - Network interfaces (errors)
NFS - NFS client
NFSD - NFS server
SOCK - Sockets (v4)
IP - IP traffic (v4)
EIP - IP traffic (v4) (errors)
ICMP - ICMP traffic (v4)
EICMP - ICMP traffic (v4) (errors)
TCP - TCP traffic (v4)
ETCP - TCP traffic (v4) (errors)
UDP - UDP traffic (v4)
SOCK6 - Sockets (v6)
IP6 - IP traffic (v6)
EIP6 - IP traffic (v6) (errors)
ICMP6 - ICMP traffic (v6)
EICMP6 - ICMP traffic (v6) (errors)
UDP6 - UDP traffic (v6)

-q Queue length and load average statistics
-r Memory utilization statistics
-R Memory statistics
-S Swap space utilization statistics
-u [ ALL ]
CPU utilization statistics
-v Kernel table statistics
-w Task creation and system switching statistics
-W Swapping statistics
-y TTY device statistics