top显示极高的负载，但 CPU 使用率相对较低。高负载是许多（约 30 个）进程的结果，从 niceness 级别 15 开始，因此系统具有响应性。
top - 18:51:04 up 28 days, 16:30, 5 users, load average: 254.30, 267.54, 265.42
Tasks: 421 total, 15 running, 406 sleeping, 0 stopped, 0 zombie
%Cpu(s): 14.4 us, 7.6 sy, 76.7 ni, 1.0 id, 0.0 wa, 0.0 hi, 0.3 si, 0.0 st
KiB Mem: 98940592 total, 98165984 used, 774616 free, 1577264 buffers
KiB Swap: 10059673+total, 659128 used, 99937600 free. 56868984 cached Mem
PID USER PR NI VIRT RES SHR S …