how to set refresh rate of SNMP host MIB

I am trying to monitor CPU usage per process on a 2003 server via SNMP
against the host MIB. Unfortunately, host data seems to be updated
only every 2 minutes.

For example, when retrieving the idle process (hrSWRunPerfCPU.1)
consumption every 5 seconds, I notice that it is really updated every
2 minutes (it remains the same then is abruptly raised by 2400 after
120 seconds).

What I need is a valid count every time I retrieve values from the
SNMP agent, so ideally, I'd like to set the internal update rate of
the host MIB part of the SNMP agent (if there is such a thing) to 1
second, for example.

I could not find anything in the registry...

Any ideas?


Many thanks in advance,


Jean-Luc