CPU相关w：查看当前系统负载[root@xiaojw~]#w14:02:34up272days,17:33,1user,loadaverage:0.00,0.03,0.01USERTTYFROMLOGIN@IDLEJCPUPCPUWHATrootpts/0183.237.175.8914:022.00s0.26s0.00sw#14:02:34up272days,17:33,1user,loadaverage:0.00,0.03,0.01#登录数的平均负载-inusersduringsystemrunningtime(Important!):1分钟以内，5分钟以内，15分钟以内#平均负载，值越大，服务器压力越大；这个值只要不超过服务器的CPU个数就可以使用cat/proc/cupinfo:查看CPU相关的基本信息[root@localhost~]#cat/proc/cpuinfoprocessor:0vendor_id:GenuineIntelcpufamily:6model：158型号名称：Intel（R）Core（TM）i5-9400CPU@2.90GHzstepping：13cpuMHz：2904.002cache16大小：92KB物理ID：0siblings：1coreid：0cpu核心：1apicid：0initialapicid：0fpu：yesfpu_exception：yescp级别：22wp：yesflags：fpuvmedepsetscmsrpaemcecx8apicsepmtrrpgemcacmovpatpse36clflushmmxfxsrssesse2htsyscallnxrdtscplmconstant_tscrep_goodnoplxtopologynonstop_tsceagerfpupnipclmulqdqmonitorssse3cx16pcidsse4_1sse4_2x2apicmovbepopcntaesxsaveavxrdrandhypervisorlahf_lmabm3dnowprefetchinvpcid_singlefsgsbaseavx2invpcidrdseedclflushoptflush_l1dbogomips:5808.00clflushsize:64cache_alignment:64addresssizes:39bitsphysical,48bitsvirtualpowermanagement:top:显示进程占用的系统资源top-07:49:20up5min,1user,loadaverage:0.00,0.01,0.01#Systemload任务：总共93个，运行1个，睡眠92个，停止0个，僵尸#进程数%Cpu(s)：0.0us，0.0sy，0.0ni，100.0id，0.0wa，0.0hi，0.0si，0.0st#CPU使用状态KiBMem：总计2914272，可用2560228，已使用222864，buff/缓存131180#内存使用KiB交换：总计3145724，可用3145724，已使用0。2542568availMem#SwappartitionusagePIDUSERRTPRRESNISVI%CPU%MEMTIME+命令1root20012801265964140S0.00.20:00.86systemd2root200000S0.00.00:00.00kthreadd4root0-20000S0.00.00:00.00kworker/0:0H5根200000S0.00.00:00.00kworker/u2:06根200000S0.00.00:00.02ksoftirqd/07根rt0000S0.00.00:00.00迁移/08root200000S0.00.00:00.00rcu_bh9root200000S0.00.00:00.25rcu_sched10root0-20000S0.00.00:00.00lru-add-drain11rootrt0000S0.00.00:00.00看门狗/013root200000S0.00.00:00.00kdevtmpfs14root0-20000S0.00.00:00.00netns15root200000S0.00.00:00.00khungtaskd16root0-20000S0.00.00:00.00写回17root0-20000S0.00.00:00.00kintegrityd18root0-20000S0.00.00:00.00bioset19root0-20000S0.00.00:00.00bioset#按shift+m:按内存使用排序#按1:列出所有核心CPU的使用情况#按q:退出测试系统加载，参考命令：{yes>/dev/null&}&&sleep30&&ps-ef|grep是|awk'{print$2}'|xargskillforiin$(seq0$(($(cat/proc/cpuinfo|grepprocessor|wc-l)-1)));dotaskset-c$iyes>/dev/null&done&&sleep30&&ps-ef|grep是|awk'{print$2}'|xargskill常用方法：top-p进程号：只观察一个进程的状态$top-p732top-22:35:00up42days,11:16,28users,loadaverage:0.00,0.01,0.05Tasks：总共0个，运行0个，睡眠0个，停止0个，僵尸%Cpu(s)：0.2us，0.5sy，0.0ni，99.3id，0.0wa，0。0hi，0.0si，0.0stKiBMem：总计3881920，免费702676，使用302076，2877168buff/cacheKiB交换：总计0，免费0，使用0。1184568availMemPIDUSERPRNIRTRESRESSHRM%S%COMMANDtop-p进程号-d间隔时间-n刷新次数others:-b:batchmodetop-bn1:non-dynamicprintingsystemresourceusageaboutmemoryfree:检查内存使用情况[root@localhost~]#free-mtotalusedfreesharedbuff/cacheavailable#Totalmemorysizeactuallyusedmemorysizefreememorysizesharedmemorybuffer/cacheavailablememoryMem:2845211250681272488Swap:307103071[root@localhost~]#free-h#更容易读取总使用的免费共享buff/可用缓存Mem:2.8G211M2.4G8.5M127M2.4GSwap:3.0G0B3.0G关于IOiostat（需要安装：yuminstallsysstat)-c:只看CPU-d:只看硬盘[root@localhost~]#iostat1#1秒刷新一次Linux3.10.0-1160.el7.x86_64(localhost.localdomain)December10,2020_x86_64_(1CPU)avg-cpu:%user%nice%system%iowait%steal%idle0.260.000.320.050.0099.36设备：tpskB_read/skB_wrtn/skB_readkB_wrtnsda5.06181.5518.6424479325135dm-03.43157.8717.1221286723087dm-10.071.630.0022040iftop：类似top的实时流量监控工具（需要安装）
