CPU utilization and kernel memory utilization

I'm mostly interested in this data for capacity planning purposes. When

 

should I start thinking about adding memory, should I perhaps move

 

some load balancing service from one set to another, those types of

 

things.

 

 

The issue that brought this to my attention was that I noticed one of

 

our F5 boxes rebooted spontaneously the other day. Turns out it was

 

because the kernel memory consumption reached 95%. However the

 

data from the statistics I got through iControl showed only about 75%

 

utilization (which is what 'bigpipe ms' showed me as well).

 

 

Looking through your various tech articles (e.g. SOL192), it is not clear

 

to me, how the output from 'bigpipe ms' (and in extension the data

 

gathered from iControl), relates to the kernel message we were seeing,

 

i.e. there seems to be a significant discrepency.

 

 

Also, it would be nice to have a more extensive description of all of the

 

statistics that are available.

 

 

Also, what about CPU utilization? Is that available though iControl? My

 

boxes don't appear even slightly stressed, but I'd like to track it to make

 

sure.

 

 

Thanks, Michel