edgan8 commented on issue #6581: Moments Sketch custom aggregator URL: https://github.com/apache/incubator-druid/pull/6581#issuecomment-460831344 @leerho thank you for the careful analysis. I believe the larger than expected errors are due to the huge spike of zero values. I can update the moments sketch to handle zero values separately since they are so common and see how they affect accuracy, though that should not affect any of the druid integration code.
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