We would love to learn more about the roadmap for histogram improvements and rough timeline / estimates for earliest GA. We are trying to standardize our metrics on Prometheus internally and have lots of DDSketch histograms to migrate. In the short term we plan to roughly translate existing DDSketch buckets to default histogram buckets. It would greatly incentivize migration internally if the feature gap is filled. Thank you for doing this valuable work!
Rong Hu Airbnb On Tuesday, September 8, 2020 at 1:56:49 PM UTC-7 [email protected] wrote: > On 02.09.20 00:38, rs vas wrote: > > > > • any good number we can cross when defining buckets for example not to > > define more than 10 le's. > > It all really depends on your total cardinality. It's fine to create a > histogram with loads of buckets if that's only exposed on three > targets and has no further labels at all. > > In your case, where you have many hosts _and_ partitioning by a bunch > of other labels with some significant cardinality, too, you really > have to be careful with the number of buckets. > > A common pattern for something like HTTP request metrics is to have a > counter with many labels (like method, path, status code, ...) and > then a histogram for the request duration with no further labels (or > at least only a few with low cardinality). In that way, you cannot > calculate latency per status code and such, but it might be a good > compromise. > > In different news, I'm working on ways to allow high-res histograms in > the future, see > > https://grafana.com/blog/2020/08/24/kubecon-cloudnativecon-eu-recap-better-histograms-for-prometheus/ > > for a bunch of links to talks etc. > > -- > Björn Rabenstein > [PGP-ID] 0x851C3DA17D748D03 > [email] [email protected] > -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/d17ea97b-06ba-496d-bf47-87a31743e3ebn%40googlegroups.com.
