High CPU Usage for an idle box

It comes and goes. Here’s it again. I mean 42% usage just sitting there, and why php, no ones even on the admin.

[root@localhost ~]# top

top - 15:02:59 up 3:32, 2 users, load average: 0.42, 0.55, 0.44
Tasks: 112 total, 1 running, 111 sleeping, 0 stopped, 0 zombie
%Cpu(s): 16.8 us, 1.9 sy, 0.0 ni, 79.2 id, 0.1 wa, 0.0 hi, 2.0 si, 0.0 st
KiB Mem : 1883096 total, 136888 free, 850596 used, 895612 buff/cache
KiB Swap: 786428 total, 786428 free, 0 used. 775316 avail Mem

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
7146 root 20 0 487920 111696 11320 S 74.3 5.9 0:03.68 php
1617 asterisk 20 0 3134416 67084 19416 S 5.3 3.6 14:35.27 asterisk
933 mysql 20 0 1958380 253044 9412 S 2.6 13.4 4:44.04 mysqld
885 mongodb 20 0 678992 70724 36924 S 2.3 3.8 5:39.28 mongod
23 root 20 0 0 0 0 S 2.0 0.0 0:28.31 ksoftirqd/3
54 root 20 0 0 0 0 S 1.0 0.0 0:12.48 kworker/u8:1
7107 root 20 0 155620 2176 1484 R 1.0 0.1 0:00.07 top
9 root 20 0 0 0 0 S 0.7 0.0 0:40.73 rcu_sched
7170 root 20 0 79360 3856 2748 S 0.7 0.2 0:00.02 gpg2keys_hkp
21259 root 20 0 1230596 14900 2488 S 0.7 0.8 1:54.25 fail2ban-server
35 root 20 0 0 0 0 S 0.3 0.0 0:02.78 kworker/0:1
663 root 20 0 543608 25464 16988 S 0.3 1.4 0:05.95 httpd
2505 asterisk 20 0 1139364 108380 13228 S 0.3 5.8 0:51.55 letschat
5701 root 20 0 0 0 0 S 0.3 0.0 0:02.54 kworker/2:2
7169 root 20 0 24816 1568 1252 S 0.3 0.1 0:00.01 gpg2
13343 root 20 0 0 0 0 S 0.3 0.0 0:37.49 kworker/1:1
1 root 20 0 43388 3724 2492 S 0.0 0.2 0:07.06 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:00.07 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 0:07.59 ksoftirqd/0
5 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/0:0H
6 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kworker/u8:0
7 root rt 0 0 0 0 S 0.0 0.0 0:04.40 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 0:01.05 watchdog/0
11 root rt 0 0 0 0 S 0.0 0.0 0:01.14 watchdog/1
12 root rt 0 0 0 0 S 0.0 0.0 0:07.99 migration/1
13 root 20 0 0 0 0 S 0.0 0.0 0:07.39 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 0:01.15 watchdog/2
17 root rt 0 0 0 0 S 0.0 0.0 0:06.70 migration/2
18 root 20 0 0 0 0 S 0.0 0.0 0:07.21 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 0:01.20 watchdog/3
22 root rt 0 0 0 0 S 0.0 0.0 0:06.55 migration/3
25 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/3:0H
27 root 20 0 0 0 0 S 0.0 0.0 0:00.05 kdevtmpfs
28 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 netns
29 root 20 0 0 0 0 S 0.0 0.0 0:00.03 khungtaskd
30 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 writeback
31 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kintegrityd
32 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 bioset
33 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kblockd
34 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 md
41 root 20 0 0 0 0 S 0.0 0.0 0:00.02 kswapd0
42 root 25 5 0 0 0 S 0.0 0.0 0:00.00 ksmd
43 root 39 19 0 0 0 S 0.0 0.0 0:00.45 khugepaged
44 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 crypto
52 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kthrotld
55 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kmpath_rdacd
56 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kpsmoused
58 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 ipv6_addrconf