topic Re: Querying CPU Utilization via SNMP in Operating System - HP-UX

Querying CPU Utilization via SNMP

Brian Frost — Thu, 29 Jul 2004 15:04:56 GMT

I'm trying to query CPU utilization data via snmp on a hpux system and the snmp agent always seems to return the same values whether the system is busy or not.

Is there something that has to be done on the system in order for it to properly report cpu utilization?

Here's an example of what I am seeing:

computerSystemUserCPU.0 907682
computerSystemSysCPU.0 1237782
computerSystemIdleCPU.0 22850595
computerSystemNiceCPU.0 131

I am not seeing these values change if a run the query again.

Re: Querying CPU Utilization via SNMP

Steven E. Protter — Thu, 29 Jul 2004 15:14:31 GMT

There are background processes that do housekeeping write data to disk, that do any number of things all the time.

There is no such thing as a totally idle system. Run top for a while and you'll see.

You might want to run some commands to measure peformance on the machine to see if your results are consistent.

Attaching a set of scripts.

SEP

Re: Querying CPU Utilization via SNMP

Brian Frost — Thu, 29 Jul 2004 22:42:07 GMT

As I said before, the values are not changing period. They are always the same whether the system is busy or not.

Re: Querying CPU Utilization via SNMP

Con O'Kelly — Thu, 29 Jul 2004 23:25:04 GMT

Hi

I don't believe there is any additional configuration needed to retrieve this data.
On my system I can run:
# snmpwalk computerSystemIdleCPU

The counter will keep incrementing each time I run it as follows:
1st time -> Counter: 346599384
2nd time -> Counter: 346608566

Not exactly sure but this may only be implemented if you are using Extensible SNMP Agent. Just an idea to explain why your counters remain the same.

Cheers
Con