How often to query?

[Kryten]

Hi,

I want to set up some powershell wmi queries across a dozen or so
Win2003 servers.

The thing is I cannot seem to find any information about how often to
actually query the servers
in question. I simply want to harvest basic information about CPU/HDD
and Memory.

I was thinking about querying every 30 minutes - does that seem
reasonable?

Would be grateful to learn what others are doing.

Thanks,
Stuart

[Programacion C]

Hi Kryten

I think that 30 minutes is too much you will not see anything, the
majority of the events will be invisible for you. Based on sampling
theory you should need at least in theory "the double of the maximum
sampling frequency". But this point is practically impossible, so IMHO
I would set up a sampling frequency of 1 second or 500 milliseconds,
but it always depends on your needs of monitoring. This sampling
frequency should be a balance between the information gathered and the
CPU load.

With 1 second I have been able to see problems with my backups and the
logon time (at the same time, the backup was finishing) on Mondays,
with 30 minutes this effect wouldn't have been possible to detect it.

Bets regards.

JL

Post by Kryten
I was thinking about querying every 30 minutes - does that seem
reasonable?