How frequently does PerfMon write to a datasource?

How frequently does PerfMon write to a datasource? References I am looking at running perfmon on our servers and storing the data to a data source, which is relatively easy to do. However, my concern is with how frequently Perfmon will perform data updates. Does it do this for every update? Meaning, if I have the interval set to 1second, does it perform an insert every second? Or does it wait and batch them together? Is there any way to control this?