Yes, that Grafana API seems to be unnecessary complicated compared to just using PromQL.
On Sat, Feb 3, 2024, 17:16 'Brian Candler' via Prometheus Users < [email protected]> wrote: > Even without a subquery, a rule can include a range vector expression and > then reduce it to an instant vector, e.g. > > expr: avg_over_time(snmp_scrape_duration_seconds[5m]) >= 3 > > On Saturday 3 February 2024 at 16:04:56 UTC Ben Kochie wrote: > >> All rule evaluations are instant queries. You do all the "reducer >> functions" in PromQL itself. >> >> For example, you can use subquery syntax to do something like >> `avg_over_time()`. >> >> On Sat, Feb 3, 2024 at 5:02 PM 'Andrew Dedesko' via Prometheus Users < >> [email protected]> wrote: >> >>> Hi, >>> >>> I'm wondering whether prometheus uses instant queries or range queries >>> when evaluating alert expressions? The context about why I'm asking might >>> help clarify my question. >>> >>> I'm comparing Grafana Cloud's alerting functionality with prometheus. >>> From Grafana Cloud we're querying Google Cloud Metrics with PromQL (it's >>> Google's Monarch DB with a PromQL interface). Grafana Cloud's alerting >>> system takes your PromQL query and performs a *range query* against >>> Google Cloud Metrics, returning multiple data points over the range you >>> have selected (e.g. 10 minutes ago to now). Then you need to choose a >>> reducer function to turn the time series into an instant scalar (e.g. min, >>> max, last, mean). >>> >>> Prometheus alerts don't seem to have an option for specifying a range >>> and also don't have a reducer option. So this leads me to believe >>> prometheus uses instant queries to evaluate alert expressions. But I'd >>> like to know for sure. >>> >>> Thanks for reading! >>> >>> Here's the Grafana Cloud documentation on alert query ranges and >>> reducers: >>> >>> https://grafana.com/docs/grafana/latest/alerting/alerting-rules/create-grafana-managed-rule/ >>> >>> -- >>> 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/ef0e2ee6-a32e-479e-bbe4-10499372715cn%40googlegroups.com >>> <https://groups.google.com/d/msgid/prometheus-users/ef0e2ee6-a32e-479e-bbe4-10499372715cn%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/12386cd6-b032-45a6-b755-f0f51551b5d3n%40googlegroups.com > <https://groups.google.com/d/msgid/prometheus-users/12386cd6-b032-45a6-b755-f0f51551b5d3n%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/CABbyFmovgyZnO8fqVQXbb9D7tgpMbN6qiEK2HnV%2BWq5MRDCeUg%40mail.gmail.com.
