According to https://esrally.readthedocs.io/en/stable/telemetry.html#node-stats
It's mentioned that
Using this telemetry device will skew your results because the node-stats API triggers additional refreshes.
What "refreshes" refers to here? Index refresh?
There is no warning or information about this in the API documentation
I'm trying to understand what's the actual overhead of calling this API. For example, whether it's okay to poll this API every X ms to plot the graph of metrics reported there.