Subject: How much spending will it cost that monitor the performance objects?

On Windows 2003 Server, I am going to monintor some performance objects and counters by Performance Console. However, it is said monitoring them will cost many resources.
So I want to know how much spending will it cost, specially for such objects as Cache, Memory, Processor, System, PhysicalDisk, LogicDisk, and so on. Is there anybody can offer me details or some documents about this issue?
And for all the objects, which ones will cost the most spending?
Thanks,
[479 byte] By [guoyanpeng] at [2007-11-18 21:50:12]