> but nothing really production-ready that I'm aware of Here are some: http://hdrhistogram.org/ http://hdrhistogram.org/ https://prometheus.io/docs/practices

> but nothing really production-ready that I'm aware of Here are some: http://hdrhistogram.org/ http://hdrhistogram.org/ https://prometheus.io/docs/practices/histograms/ https://prometheus.io/docs/practices/histograms/ (Victoria Metrics is also worth looking at, IIRC they store quantiles differently) https://prestodb.io/docs/current/functions/qdigest.html https://prestodb.io/docs/current/functions/qdigest.html