linux 负载很高.

Question

使用SSH命令操作也没感觉很慢.就是访问top-16:10:43up50min,2users,loadaverage:4.72,4.58,4.35Tasks:114total,1running,113sleeping,0stopped,0zombie%Cpu(s):18.7us,3.0sy,0.0ni,37.5id,40.6wa,0.2hi,0.0si,0.0stKiBMem:7693560total,1957232used,5736328free,47460buffersKiBSwap:0total,0used,0free.1291540cachedMemTotalDISKREAD:0.00B/s|TotalDISKWRITE:0.00B/sActualDISKREAD:0.00B/s|ActualDISKWRITE:0.00B/sTIDPRIOUSERDISKREADDISKWRITESWAPINIO>COMMAND5972be/4www0.00B/s0.00B/s0.00%99.99%nginx:workerprocess1be/4root0.00B/s0.00B/s0.00%0.00%init2be/4root0.00B/s0.00B/s0.00%0.00%[kthreadd]3be/4root0.00B/s0.00B/s0.00%0.00%[ksoftirqd/0]4be/4root0.00B/s0.00B/s0.00%0.00%[kworker/0:0]5be/0root0.00B/s0.00B/s0.00%0.00%[kworker/0:0H]7be/4root0.00B/s0.00B/s0.00%0.00%[rcu_sched]8be/4root0.00B/s0.00B/s0.00%0.00%[rcuos/0]9be/4root0.00B/s0.00B/s0.00%0.00%[rcuos/1]10be/4root0.00B/s0.00B/s0.00%0.00%[rcuos/2]11be/4root0.00B/s0.00B/s0.00%0.00%[rcuos/3]12be/4root0.00B/s0.00B/s0.00%0.00%[rcu_bh]13be/4root0.00B/s0.00B/s0.00%0.00%[rcuob/0]14be/4root0.00B/s0.00B/s0.00%0.00%[rcuob/1]15be/4root0.00B/s0.00B/s0.00%0.00%[rcuob/2]16be/4root0.00B/s0.00B/s0.00%0.00%[rcuob/3]17rt/4root0.00B/s0.00B/s0.00%0.00%[migration/0]18rt/4root0.00B/s0.00B/s0.00%0.00%[watchdog/0]19rt/4root0.00B/s0.00B/s0.00%0.00%[watchdog/1]20rt/4root0.00B/s0.00B/s0.00%0.00%[migration/1]21be/4root0.00B/s0.00B/s0.00%0.00%[ksoftirqd/1]22be/4root0.00B/s0.00B/s0.00%0.00%[kworker/1:0]23be/0root0.00B/s0.00B/s0.00%0.00%[kworker/1:0H]24rt/4root0.00B/s0.00B/s0.00%0.00%[watchdog/2]25rt/4root0.00B/s0.00B/s0.00%0.00%[migration/2]26be/4root0.00B/s0.00B/s0.00%0.00%[ksoftirqd/2]27be/4root0.00B/s0.00B/s0.00%0.00%[kworker/2:0]28be/0root0.00B/s0.00B/s0.00%0.00%[kworker/2:0H]29rt/4root0.00B/s0.00B/s0.00%0.00%[watchdog/3]30rt/4root0.00B/s0.00B/s0.00%0.00%[migration/3]31be/4root0.00B/s0.00B/s0.00%0.00%[ksoftirqd/3]32be/4root0.00B/s0.00B/s0.00%0.00%[kworker/3:0]33be/0root0.00B/s0.00B/s0.00%0.00%[kworker/3:0H]34be/0root0.00B/s0.00B/s0.00%0.00%[khelper]35be/4root0.00B/s0.00B/s0.00%0.00%[kdevtmpfs]36be/0root0.00B/s0.00B/s0.00%0.00%[netns]37be/4root0.00B/s0.00B/s0.00%0.00%[xenwatch]38be/4root0.00B/s0.00B/s0.00%0.00%[xenbus]39be/0root0.00B/s0.00B/s0.00%0.00%[writeback]40be/0root0.00B/s0.00B/s0.00%0.00%[kintegrityd]41be/0root0.00B/s0.00B/s0.00%0.00%[bioset]42be/0root0.00B/s0.00B/s0.00%0.00%[kworker/u9:0]43be/0root0.00B/s0.00B/s0.00%0.00%[kblockd]44be/4root0.00B/s0.00B/s0.00%0.00%[kworker/1:1]45be/0root0.00B/s0.00B/s0.00%0.00%[ata_sff]46be/4root0.00B/s0.00B/s0.00%0.00%[khubd]47be/0root0.00B/s0.00B/s0.00%0.00%[md]48be/0root0.00B/s0.00B/s0.00%0.00%[devfreq_wq]CPU型号[4核]Intel(R)Xeon(R)CPUE5-2680v2@2.80GHz|频率:2793.304|二级缓存:25600KB|Bogomips:5586.60×4内存使用状况内存参数解读物理内存：共7.337GB,已用0.948GB,空闲6.389GB,使用率12.92%Cache化内存为0.239GB,使用率3.25%|Buffers缓冲为0.052GB真实内存使用0.657GB,真实内存空闲6.68GB,使用率8.96%系统平均负载5.954.894.701/172Linux3.13.0-29-generic(ip-172-31-8-92)09/26/2014_x86_64_(4CPU)avg-cpu:%user%nice%system%iowait%steal%idle15.470.003.4236.550.1644.40Device:tpskB_read/skB_wrtn/skB_readkB_wrtnxvdap120.5765.311718.472681017054072