命令介绍sar命令用于综合获取系统的CPU、运行队列、磁盘I/O、分页（交换区）、内存、CPU中断、网络等性能数据。语法格式sar-[options]time_intervalnumber_of_tines_to_displayoptiondescription-A#所有报告汇总-a#查看文件读写使用情况-B#查看额外缓存使用情况-b#查看缓存使用情况-c#查看系统调用使用情况-d#查看磁盘使用情况-g#查看串口使用情况-h#查看缓冲区使用情况统计-m#查看IPC消息队列和信号量使用情况-n#查看命名缓存使用情况-p#查看分页活动使用情况-q#查看平均负载-R#查看进程活动-r#查看未使用的内存页和硬盘块-u#查看CPU利用率-v#查看进程、i节点、文件和锁表状态-w#查看系统交换活动状态-y#查看TTYdeviceactivitystatus查看内存交换空间使用信息的应用示例[root@centos7~]#sar-rLinux3.10.0-1127.18.2.el7.x86_64(centos7)03/28/2021_x86_64_(1CPU)11:10:02?AM?kbmemfree?kbmemused??%memused?kbbuffers??kbcached??kbcommit???%commit??kbactive???kbinact???kbdirty11:20:01?AM????532544????463140?????46.51??????2108????313176????232184??????7.51216412134456011:30:01AM53250446318046.5221083131802321847.512164361344120Average:53252446316046.522108321847.51164241344340输出结果字段说明kbmemfree#空闲物理内存kbmemused#正在使用的物理内存%memused#物理内存使用率kbbuffers#在内核中用作缓冲区的物理内存容量kbcacheed#在内核中用作缓存的物理内存内存容量kbswpfree#交换区空闲容量kbswpused#正在使用的交换区容量，查看CPU使用率[root@centos7~]#sar-uLinux3.10.0-1127.18.2.el7.x86_64(centos7)03/28/2021_x86_64_(1cpu)11:10:02amCPU%User%Nice%System%System%Steal%IDLE11:20:01AMAM0.030.000.020.0099.7711:30:01AM所有0.030.000.020.020.00:99.78aveall0.030.000.180.020.0099.77查看平均负载[root@CentOS7~]#SAR-QLINUX3.10.0-1127.18.2.EL7.x86_64(CentOS7)03/28/2021_x6_64_(1cpu)11:10:02ammRunq-SZPlist-SZLDAVG-5LDAVG-5BLOCKED11:20:01AM11080.010.05011:30:01AM11080.010.050Average:110800.000.010.050查看页面交换发生[root@centos7~]#sar-wLinux3.10.0-1127.18.2.el7.x86_64(centos7)03/28/2021_x86_64_(1CPU)11:10:02AMProc/sCSWCH/S1:20:01AM0.0219.1011:30:01AM0.0319.9211:40:01AM0.0219.45Average:0.0219.49查看I/O和传输率统计[root@centeros7~]#sar-sar-Blinux3.10.0-1127.18.2.El7.x86_64(CentOS7)03/28/2021_x6_64_(1CPU)11:10:02AMTPSRTPSBREAD/sBWRTN/S11:20:0.060.060.000.7411:30:01AM0.030.000.030.000.40Average:0.050.000.050.000.57输出字段说明TPS#物理设备每秒的I/O传输总量物理设备RTPS#每秒从物理设备读取的数据总量wtps#每秒写入物理设备的数据总量bread/s#每秒从物理设备读取的数据量，单位为block/sbwrtn/s#每秒写入物理设备的数据量，本机查看block/s的网络状态信息[root@centos7~]#sar-nDEVLinux3.10.0-1127.18.2.el7.x86_64(centos7)03/28/2021_x86_64_(1CPU)11:10:02AMIFACErxpck/stxpck/srxkB/s????txkB/s???rxcmp/s???txcmp/s??rxmcst/s11:20:01?AM????????lo??????0.00??????0.00??????0.00??????0.00??????0.00??????0.00??????0.0011:20:01?AM?????ens33??????0.83??????0.54??????0.06??????0.05??????0.00??????0.00??????0.0011:30:01?AM????????lo??????0.00??????0.00??????0.000.00??????0.00??????0.00??????0.0011:30:01?AM?????ens33??????1.07??????0.69??????0.08??????0.06??????0.00??????0.00??????0.0011:40:01?AM????????lo??????0.00??????0.00??????0.00??????0.00??????0.00??????0.00??????0.0011:40:01?AM?????ens33??????0.91??????0.60??????0.07??????0.05??????0.00??????0.00??????0.00Average:???????????lo??????0.00??????0.00??????0.00??????0.000.000.000.00平均：ens330.940.610.070.050.000.00
