Forum Discussion
Michel_van_der_
Nimbostratus
NimbostratusWhat is 'tmm'
In the process of doing some iControl work, a process called tmm is now using 99.9 % of the CPU on my BigIP box. Not sure if I caused it (pretty sure I did though :-), since all the box is used for now is my iControl work).
What is that? Should I reboot? Anything F5 is interested in? Is this due to a bad iControl call?
BTW it looks like some iControl calls never come back now.
Thanks, Michel
- JRahm
Admin
TMM is the traffic management (microkernel?), it is the brains of the BigIP. What command are you using to show the CPU at 100%? The unix tools available on the cli are not accurate since the tmm allocates a bulk of the system resources to itself. 
Michel_van_der_I just use top. The reason I went hunting is because iControl became non-responsive.
But I checked the active box, and I guess top doesn't work, since it shows 99.9% usage as well.
OK, let me reboot and see if iControl is happier.
Michel- No need to reboot. "bigstart restart httpd" should reset the iControl code.
-Joe - FYI:
I think there is an open issue with F5 that the UNIX top command always shows 99% CPU. They have recommended that you get CPU stats for the BIG-IP performance section and not to trust top until the issue is resolved.. - Yes, our traffic controls take over the user mode cpus and distributes the cpu outside of kernel space so "top" is not a reliable monitoring tool. tmstat is an internal tool that does provide cpu utilization within our micro kernel.
Jex_8331Hi guys,
I have a question so by issuing "bigstart restart httpd" will clear the iControl do u think it will help to prevent causing the high CPU usage on the BigIP box?
