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Vishwas R

In that case I would suggest filtering dataPoints to something below 10K because column charts are not meant to handle such large Data Sets. In any case when you have large number of dataPoints, columns will overlap and only a few (equal to number of pixels horizontally) of them would be visible. So you can filter them initially and then add more dataPoints when user zooms into a region using rangeChanging. Here is an example.