我有兩個 openstack 實例
節點 1 - 16 個 vCPU / 16 GB 記憶體 節點 2 - 8 個 vCPU / 8 GB 內存
兩台機器都位於 F5 負載平衡器（循環）和正在運行的MongoosIM應用程式之後，但我注意到 16 vCPU 核心機器的 CPU 使用率始終高於低 cpu 雲端節點，為什麼？
節點1
top - 04:08:00 up 113 days, 10:50, 1 user, load average: 5.78, 5.78, 5.73
Tasks: 215 total, 1 running, 214 sleeping, 0 stopped, 0 zombie
%Cpu0 : 7.5 us, 4.7 sy, 0.0 ni, 86.0 id, 0.0 wa, 0.0 hi, 1.1 si, 0.7 st
%Cpu1 : 7.6 us, 3.1 sy, 0.0 ni, 87.8 id, 0.0 wa, 0.0 hi, 1.0 si, 0.3 st
%Cpu2 : 32.0 us, 18.9 sy, 0.0 ni, 46.5 id, 0.0 wa, 0.0 hi, 2.2 si, 0.4 st
%Cpu3 : 32.3 us, 19.0 sy, 0.0 ni, 46.1 id, 0.0 wa, 0.0 hi, 1.9 si, 0.7 st
%Cpu4 : 13.3 us, 6.0 sy, 0.0 ni, 80.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.7 st
%Cpu5 : 4.1 us, 1.4 sy, 0.0 ni, 94.2 id, 0.0 wa, 0.0 hi, 0.0 si, 0.3 st
%Cpu6 : 42.4 us, 23.6 sy, 0.0 ni, 29.7 id, 0.0 wa, 0.0 hi, 4.0 si, 0.4 st
%Cpu7 : 40.2 us, 24.4 sy, 0.0 ni, 31.0 id, 0.0 wa, 0.0 hi, 4.1 si, 0.4 st
%Cpu8 : 7.5 us, 3.9 sy, 0.0 ni, 88.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.4 st
%Cpu9 : 3.4 us, 2.7 sy, 0.0 ni, 93.6 id, 0.0 wa, 0.0 hi, 0.0 si, 0.3 st
%Cpu10 : 42.3 us, 25.9 sy, 0.0 ni, 27.7 id, 0.0 wa, 0.0 hi, 3.6 si, 0.4 st
%Cpu11 : 42.0 us, 24.2 sy, 0.0 ni, 29.7 id, 0.0 wa, 0.0 hi, 3.7 si, 0.4 st
%Cpu12 : 10.8 us, 5.4 sy, 0.0 ni, 83.5 id, 0.0 wa, 0.0 hi, 0.0 si, 0.4 st
%Cpu13 : 5.5 us, 3.4 sy, 0.0 ni, 90.8 id, 0.0 wa, 0.0 hi, 0.0 si, 0.3 st
%Cpu14 : 38.6 us, 18.7 sy, 0.0 ni, 40.8 id, 0.0 wa, 0.0 hi, 1.5 si, 0.4 st
%Cpu15 : 36.7 us, 21.1 sy, 0.0 ni, 39.3 id, 0.0 wa, 0.0 hi, 2.2 si, 0.7 st
KiB Mem : 16265260 total, 10171104 free, 4512244 used, 1581912 buff/cache
KiB Swap: 4194300 total, 3299368 free, 894932 used. 11295924 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
24196 mongoos+ 20 0 6133060 4.0g 5356 S 634.2 25.8 2008:49 beam.smp
15607 root 20 0 369660 4332 2200 S 3.0 0.0 16:15.21 syslog-ng
28638 telegraf 20 0 1467376 10920 2572 S 1.0 0.1 66:32.90 telegraf
9 root 20 0 0 0 0 S 0.3 0.0 220:19.68 rcu_sched
24 root 20 0 0 0 0 S 0.3 0.0 1:18.90 ksoftirqd/3
1 root 20 0 191916 2852 1632 S 0.0 0.0 50:34.00 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:07.09 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 1:46.54 ksoftirqd/0
5 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/0:0H
7 root rt 0 0 0 0 S 0.0 0.0 0:08.29 migration/0
8 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcu_bh
10 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 lru-add-drain
11 root rt 0 0 0 0 S 0.0 0.0 0:38.17 watchdog/0
12 root rt 0 0 0 0 S 0.0 0.0 0:34.54 watchdog/1
13 root rt 0 0 0 0 S 0.0 0.0 0:26.85 migration/1
14 root 20 0 0 0 0 S 0.0 0.0 0:36.04 ksoftirqd/1
節點2
top - 04:08:03 up 11 days, 8:44, 1 user, load average: 4.85, 5.19, 5.32
Tasks: 157 total, 1 running, 156 sleeping, 0 stopped, 0 zombie
%Cpu0 : 33.7 us, 10.8 sy, 0.0 ni, 54.1 id, 0.0 wa, 0.0 hi, 0.7 si, 0.7 st
%Cpu1 : 30.1 us, 9.2 sy, 0.0 ni, 59.2 id, 0.0 wa, 0.0 hi, 0.7 si, 0.7 st
%Cpu2 : 50.4 us, 21.6 sy, 0.0 ni, 11.9 id, 0.0 wa, 0.0 hi, 16.2 si, 0.0 st
%Cpu3 : 56.8 us, 25.0 sy, 0.0 ni, 17.9 id, 0.0 wa, 0.0 hi, 0.0 si, 0.4 st
%Cpu4 : 28.4 us, 9.7 sy, 0.0 ni, 58.6 id, 0.0 wa, 0.0 hi, 0.7 si, 2.6 st
%Cpu5 : 26.5 us, 10.3 sy, 0.0 ni, 60.3 id, 0.0 wa, 0.0 hi, 0.4 si, 2.6 st
%Cpu6 : 32.1 us, 8.8 sy, 0.0 ni, 57.3 id, 0.0 wa, 0.0 hi, 0.4 si, 1.5 st
%Cpu7 : 26.8 us, 9.6 sy, 0.0 ni, 62.1 id, 0.0 wa, 0.0 hi, 0.4 si, 1.1 st
KiB Mem : 8009896 total, 380252 free, 4294772 used, 3334872 buff/cache
KiB Swap: 0 total, 0 free, 0 used. 3085036 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
17526 mongoos+ 20 0 5134916 3.715g 5364 S 406.3 48.6 1496:28 beam.smp
1640 root 20 0 567508 7544 1924 S 3.0 0.1 408:19.27 syslog-ng
3669 tcpdump 20 0 32404 9316 7964 S 2.3 0.1 471:10.66 tcpdump
544 dbus 20 0 70440 1244 620 S 0.7 0.0 4:14.68 dbus-daemon
9 root 20 0 0 0 0 S 0.3 0.0 67:35.00 rcu_sched
417 root 20 0 39476 3628 3228 S 0.3 0.0 1:16.69 systemd-journal
907 root 20 0 523728 5724 2988 S 0.3 0.1 0:33.15 rsyslogd
1 root 20 0 43856 3024 1296 S 0.0 0.0 3:26.52 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:00.37 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 0:48.60 ksoftirqd/0
5 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/0:0H
7 root rt 0 0 0 0 S 0.0 0.0 0:01.63 migration/0
8 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcu_bh
10 root rt 0 0 0 0 S 0.0 0.0 0:04.42 watchdog/0
11 root rt 0 0 0 0 S 0.0 0.0 0:04.02 watchdog/1
12 root rt 0 0 0 0 S 0.0 0.0 0:02.75 migration/1
13 root 20 0 0 0 0 S 0.0 0.0 0:29.87 ksoftirqd/1
15 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/1:0H
16 root rt 0 0 0 0 S 0.0 0.0 0:05.04 watchdog/2
17 root rt 0 0 0 0 S 0.0 0.0 0:03.58 migration/2
18 root 20 0 0 0 0 S 0.0 0.0 11:16.55 ksoftirqd/2
20 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/2:0H
21 root rt 0 0 0 0 S 0.0 0.0 0:03.88 watchdog/3
22 root rt 0 0 0 0 S 0.0 0.0 0:01.89 migration/3