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[root@hanode1 ~]# top
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top - 03:40:51 up 8 days, 8:17, 6 users, load average: 0.21, 0.37, 0.28
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Tasks: 152 total, 2 running, 150 sleeping, 0 stopped, 0 zombie
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Cpu(s): 17.5%us, 5.5%sy, 0.0%ni, 74.9%id, 0.0%wa, 0.0%hi, 2.1%si, 0.0%st
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Mem: 1019320k total, 787364k used, 231956k free, 83380k buffers
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Swap: 2064376k total, 184k used, 2064192k free, 142384k cached
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PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
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24809 postgres 20 0 711m 420m 11m R 58.2 42.2 6:02.83 mongod
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29480 postgres 20 0 208m 7016 4528 S 41.6 0.7 0:02.78 php
索引查询速度大约每秒1.26w次,mongod消耗CPU 58.2% ,经过计算将1个cpu core用满可以达到2.2w/s(1/0.582)。