SNMP service loading CPU for no reason

[ikke]

Hi,

I have had high CPU on my FreeNAS recently. I started debugging it, and noticed that /usr/local/bin/snmp-agent.py gets very often run, and tops the CPU for some time. I have forgotten it enabled as I used to query it years ago, but haven't had any use for it in long time. No one calls SNMP over network. I verified with tcpdump.

So why on earth is SNMP service loading the CPU as no one queries it?

Just disabling the service takes loads away. Also graphs have a noticeable difference. Loads drop from 1.7 to ~0.5 instantly after disabling SNMP.

 

[ikke]

Another weird thing causing load I noticed is alertscli.py. It keeps CPU busy like 15 seconds at the time. Peeking into it shows it should basically grep stuff from a temp file. Shouldn't take so much CPU.

This box is a low end old atom box, purpose to be low powered quit box at corner of home. You wouldn't notice these likely on any real Xeon box :)

I just had to start debugging, as the box started to crash after the recent update to 11.1-Release.

 

[dlavigne]

This will be fixed in the next update: https://redmine.ixsystems.com/issues/27298.