Zigzag CPU Load

[manuel]

Hello
I have collectd running on my opnsense box which is a apu2e4 with 4 cores (AMD Embedded G series GX-412TC) and 4GB RAM. As you can see in my Grafana Graphics there is a zigzag of the CPU Usage. Normally the cpu load raises over 2 or 3 days continuously and then drops to 1%.

Does anybody know the reason for this or has made same observation?

Thank you very much for a hint.

Greetings Manuel

[gpb]

It's normal...it's related to insight data (flowd_aggregate.py) and file processing.

https://github.com/opnsense/core/issues/3587

[manuel]

Hello gpb
Thank you for your answer and the link. This is it. 

Regards Manuel

[manuel]

Hello
After updating to newest release 21.1.5 on 23.05. 12:00 the CPU Load looks now different. As mentioned by gpb python3.7 is using quite a lot of CPU time.

Code: [Select]

last pid: 16333;  load averages:  0.79,  0.89,  0.89                                                                                                                         up 3+20:47:14  08:57:55
49 processes:  1 running, 48 sleeping
CPU:  2.8% user,  0.0% nice,  7.0% system,  0.6% interrupt, 89.6% idle
Mem: 53M Active, 1518M Inact, 461M Wired, 217M Buf, 2095M Free
Swap: 2048M Total, 2048M Free

  PID USERNAME    THR PRI NICE   SIZE    RES STATE    C   TIME    WCPU COMMAND
17984 root          1  20    0    29M    20M select   2  35.3H   0.03% python3.7
88970 root          1  20    0  1048M  8424K select   2  10:52   0.14% openvpn
68332 root         11  20    0    39M  7824K nanslp   3   8:45   0.00% collectd
 8987 root          1  52    0  1037M  3332K wait     3   2:40   0.00% sh
90751 root          1  20    0    26M    11M select   2   1:53   0.04% python3.7
16747 root          1  20    0    21M    11M select   2   1:42   0.04% python3.7
90286 root          3  20    0    32M    11M kqread   2   1:33   0.08% syslog-ng
58694 root          1  52    0    54M    32M accept   0   1:29   0.97% python3.7

Greetings Manuel

[gpb]

The graphs look the similar to me.  One thing you might check is do you have PowerD enabled...check under System | Settings | Miscellaneous.  Adaptive works well for my setup...this was something I overlooked for quite a while after switching to OPNsense...so just in case you never checked it.  Anyhow it might make a difference.

Also, I've run into a situation where the RRD netflow data gets corrupted or confused and resetting/repairing will resolve excess CPU in this case...so that's something else to check.  That's under Reporting | Settings.