top - 14:51:31 up 11:24, 5 users, load average: 0.79, 0.95, 0.97 Tasks: 173 total, 2 running, 171 sleeping, 0 stopped, 0 zombie %Cpu(s): 9.1 us, 4.5 sy, 0.0 ni, 85.5 id, 0.0 wa, 0.0 hi, 1.0 si, 0.0 st KiB Mem : 32601524 total, 24374660 free, 2048104 used, 6178760 buff/cache KiB Swap: 8191996 total, 8191996 free, 0 used. 28478564 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 27018 mysql 20 0 7548496 1.682g 12528 S 91.7 5.4 56:12.75 /usr/sbin/mysqld Mysql用户使用的是91.7％左右，而％cpu是9.1这是什么意思？
这台服务器只运行mysql
正如@ c4f4t0r alreydy提到的那样，这意味着你的机器上有多个CPU核心。 您可以按1并查看每个CPU的负载。 它应该看起来像：
top - 11:14:48 up 100 days, 13:14, 1 user, load average: 1.31, 1.52, 1.60 Tasks: 302 total, 1 running, 301 sleeping, 0 stopped, 0 zombie Cpu0 : 20.5%us, 6.9%sy, 0.0%ni, 43.2%id, 28.1%wa, 0.0%hi, 0.0%si, 1.3%st Cpu1 : 12.7%us, 0.7%sy, 0.0%ni, 85.3%id, 0.0%wa, 0.0%hi, 0.0%si, 1.3%st Cpu2 : 4.6%us, 1.3%sy, 0.0%ni, 92.1%id, 0.0%wa, 0.0%hi, 0.0%si, 2.0%st Cpu3 : 37.6%us, 5.0%sy, 0.0%ni, 55.4%id, 0.0%wa, 0.0%hi, 0.7%si, 1.3%st Cpu4 : 42.0%us, 1.0%sy, 0.0%ni, 53.4%id, 2.0%wa, 0.0%hi, 0.0%si, 1.6%st Cpu5 : 8.9%us, 0.7%sy, 0.0%ni, 89.1%id, 0.3%wa, 0.0%hi, 0.0%si, 1.0%st Mem: 10127380k total, 9939356k used, 188024k free, 165304k buffers Swap: 1020k total, 1020k used, 0k free, 3213328k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 9364 mysql 20 0 9858m 5.6g 5068 S 103.6 57.5 40717:04 mysqld
这意味着你有一个有多个CPU核心的系统，91.7是一个核心
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