WARNING: This change will not change either the step or the heartbeat of existing RRDfiles.After this change, a Rebuild Poller Cache operation will take place in background to update the data collection cycle for the impacted Data Sources.It is strongly suggested that you either delete all the impacted RRDfiles afterwards, or use the splice_rrd.php CLI script to preserve old data and repopulate the new RRDfiles with the legacy data.Otherwise, this change will have no on the data and may in fact lead to a loss of fidelity if you are increasing the time between data collection cycles.
The Gradient Height parameter can create three different behaviors. If it is > 0, then the gradient is a fixed height, starting at the line going down. If it is < 0, then the gradient starts at a fixed height above the x-axis, going down to the x-axis. If it is == 0, then the gradient goes from the top of the area fill to x-axis.
