top - 16:07:47 up 168 days, 5:59, 1 user, load average: 0.43, 0.62, 0.60
Tasks: 124 total, 1 running, 123 sleeping, 0 stopped, 0 zombie
Cpu(s): 1.5%us, 0.5%sy, 0.0%ni, 97.8%id, 0.2%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 4046316k total, 3701332k used, 344984k free, 144148k buffers
Swap: 0k total, 0k used, 0k free, 1313100k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
10301 root 10 -10 3364m 623m 39m S 1.7 15.8 29733:59 java
20624 rabbitmq 10 -10 1094m 78m 4000 S 1.7 2.0 1373:53 beam.smp
22454 root 10 -10 124m 20m 11m S 0.7 0.5 623:54.23 AliYunDun
1434 root 10 -10 49492 10m 2152 S 0.3 0.3 208:23.97 redis-server
9603 root 10 -10 3540m 318m 15m S 0.3 8.1 97:44.22 java
1 root 20 0 19292 1792 1516 S 0.0 0.0 0:01.13 init
2 root 20 0 0 0 0 S 0.0 0.0 0:00.02 kthreadd
us:使用率
sy:system
id: idal 空闲率 越大越好
load average: 系统负载率 后面三个数字分表代表 1分钟 5分钟 15分钟内的负载率 三个值相加*100% 值如果超过60% 说明负载较重
TIME+ COMMAND: 程序使用时间
退出方式：q 尽量避免ctrl+c
