100% CPU load on standard host MIB SNMP

YoMarK · Aug 7, 2008, 9:06 PM

I've upgraded 2 1.2 installations to pfSense-Full-Update-1.2.1-RC1-20080806-1907.tgz today.
We use cacti(www.cacti.org) to monitor our network devices, and after the upgrade both upgraded pfSenses show constant 100% CPU load on the standard host MIB(oid .1.3.6.1.2.1.25.3.3.1) although this is not really the case(RRD graphs inside the pfSense webinterface show the correct values, as does "top" from the commandline). Other SNMP data(such as PF statistics and interface traffic) shows correctly, so it's not a general SNMP problem.

I think this is a bug, havent tried a fresh 1.2.1 install though.

luma · Aug 14, 2008, 9:50 AM

Hi,

same here… Has anyone find a solution?

Thanks and regards

jahonix · Aug 14, 2008, 10:40 AM

I cannot help with the initial problem but found the link to cacti being slightly incorrect.
You can find it here: http://www.cacti.net

Once I have some spare time I will have a deeper look at cact and might implement it on my site as well. Sounds useful!

luma · Aug 14, 2008, 12:01 PM

It seems to be a known problem.

I'm not a kernel/snmp expert but I found this thread :

http://unix.derkeiler.com/Mailing-Lists/FreeBSD/current/2008-05/msg00436.html

So it's not a Cacti problem.

On my Alix 2c3, the command :
%snmpwalk -v2c -c public XXX.XXX.XXX.XXX hrProcessorLoad
returns me :
HOST-RESOURCES-MIB::hrProcessorLoad.4 = INTEGER: 100

Regards

sullrich · Aug 14, 2008, 4:51 PM

Thanks, fix just commited. Please try next snapshot run.

YoMarK · Aug 15, 2008, 5:17 PM

Just did a upgrade to pfSense-Full-Update-1.2.1-RC1-20080814-1819.tgz(but maybe the fix is not in this snapshot, will try again later), but the problem still exists.

snmpwalk -v2c -c public XXX.XXX.XXX.XXX hrProcessorLoad returns
HOST-RESOURCES-MIB::hrProcessorLoad.7 = INTEGER: 100

On 1.2.0 stable it returns the correct values.

YoMarK · Aug 16, 2008, 6:51 PM

Still not solved in pfSense-Full-Update-1.2.1-RC1-20080815-2044.tgz .

sullrich · Aug 17, 2008, 8:25 PM

That patch is there, guess that was not the resolution after all.

YoMarK · Aug 19, 2008, 5:29 PM

Correction…it does seem to work now in pfSense-Full-Update-1.2.1-RC1-20080815-2044.tgz after an extra reboot.
CPU loads seems to be somewhat lower then before the upgrade to 1.2.1, probably the same thing as mentioned in luma's link.
But this is much better, thanks!

luma · Aug 19, 2008, 5:31 PM

Good work! Yes it's now working with the new update or reboot, I don't really know! Thanks for your good work!

Regards