The CPU Utilization and ASM CUP Utilization

The CPU and ASM CPU utilization are averages over the time period since you last reset stats. All of the other stats are totals over the time period.

So I would assume that over the time period since the last reset that you are not really doing a lot of work.

When did you last reset the stats? If you have not reset the stats, how long since you last rebooted the box?

Hi Giltjr,

The box is not rebooted or no stats has been reset for around 1 week time. The box is still not in complete production but there has been a traffic flow as can be seen from the stats but the CPU Utilization and ASM CPU utilization show no reading. I do understand that CPU and ASM CPU utilization's are averages over time time period but why is it showing zero even when I click on the Dashboard its showing me the reading for CPU utilization though I don't get the details for which application the CPU is getting used.

Regards,

if these values are zero that means that the traffic handling by the virtual server or ASM profiles don't put enough load on your box to be counted. looking at the counters they aren't that high either.

how high is the load on the dashboard then? there are all kinds of processes running, not everything is directly related to specific VIPs to stand out.

I have not use ASM, but based on the screen shot I would assume that for the one hosts that show no data, that means they have have had no connections that require ASM to do anything.

For the one host that shows 0% it, after a week, has had a total of 537 requests.

When you bring up the dashboard are you seeing any connection? Are you seeing anything that implies there is traffic/request going through this box?

Thanks Scott& Giltjr for the input but i need to understand one point when you say

"There has been no enough traffic through the VS or ASM to even register" so can you guys tell any base line as to if this much traffic has passed through the particular VS then only the CPU and ASM CPU utilization will show any figures.

Thanks Scott& Giltjr for the input but i need to understand one point when you say

"There has been no enough traffic through the VS or ASM to even register" so can you guys tell any base line as to if this much traffic has passed through the particular VS then only the CPU and ASM CPU utilization will show any figures.

I don't think there is a base line. It really depends on what you have your ASM configuration doing.

Since this is not in production yet, you would need to be monitoring when traffic is actually flowing through this box to see anything and it may need to be more than just a few packets every now and then.

We don't have ASM, just LTM and in our production boxes we only avg. about 3% CPU utilization, that is with 6-7K active connections, about 15Mbps going through the box and doing 10Mbps compression. If nothing is going through your box, then you would be way below our CPU utilization.

indeed, these can't be hard limits as there are many difference boxes with different specs.

also if you have lots of virtual servers and they all get about an equal amount of traffic the counters probably will stay at zero also.

is there a reason you worry about this? in my opinion as long as the box isn't showing any cpu usage but the traffic counters are going up and you dont have complaints, be happy.

Thanks boneyard and Giltjr for your replies but the problem I have is that some times the VS statistic counters are high and it is very imp to relate it to the memory and CPU utilization to know which VS is really taking up the major resource of the box. So this counter is very important for me...

What you need to do then is have something monitor the F5 constantly that can monitor it at the VS level. Looking at what the F5 does out of the box will not help you at all because it is showing you stats/avg. since the the last time the box was rebooted or the last time you cleared the stats.

You will want to look into using Cacti, Nagios, or Solarwinds' NPM product. I would only use Solarwinds's NPM if you already have it, because it can be quite expensive. Cacti and Nagios are both free.