To be clear, I'm talking about the "Min step" in here https://grafana.com/docs/grafana/latest/features/datasources/prometheus/#prometheus-query-editor which maps to "step: Query resolution step width in duration format or float number of seconds." in range query API.
The 3x, 4x sounds like applying to the range query selector <https://prometheus.io/docs/prometheus/latest/querying/basics/#range-vector-selectors>? I saw the similar suggestion at robust perception <https://www.robustperception.io/what-range-should-i-use-with-rate> as well. I didn't know how to use $__interval though, let me check how that works. Thanks! On Sunday, June 14, 2020 at 12:09:08 PM UTC-7, Ben Kochie wrote: > > Generally, if you're using $__interval in Grafana, you want to have a min > step that's 3x or 4x your scrape interval. This allows the rate() function > to handle missed scrapes and counter resets better. > > It definitely doesn't make sense to have the min step finer than your > interval. You need 2x the interval at a minimum for rate() to even function > properly. > > If you need more resolution than 1m, I would suggest a scrape interval of > 5s. > > On Sun, Jun 14, 2020 at 7:21 PM Ray Wu <[email protected] <javascript:>> > wrote: > >> I use grafana to plot some system metrics from node_exporter. I set my >> prometheus scrape interval to 15s and grafana's default min step is 10s. >> Does that make sense to plot in the finer granularity than the sampling >> rate at all? >> Is there any doc explain how does Prometheus calculate this? >> >> -- >> 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] <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/prometheus-users/12858dde-c547-454c-80a6-87f9e67096b8o%40googlegroups.com >> >> <https://groups.google.com/d/msgid/prometheus-users/12858dde-c547-454c-80a6-87f9e67096b8o%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- 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/81c4261a-864c-4d12-b0ee-62d624b35e5bo%40googlegroups.com.
