Hi, On 5/18/20 12:38 PM, zichen chuh wrote: > https://prometheus.io/docs/prometheus/latest/configuration/alerting_rules/ : > >> For pending and firing alerts, Prometheus also stores synthetic time > series of the form ALERTS{alertname="<alert name>", > alertstate="pending|firing", <additional alert labels>}. The sample > value is set to 1 as long as the alert is in the indicated active > (pending or firing) state, and the series is marked stale when this is > no longer the case. > > Can I ask what does stale mean? > Does it mean the series data is deleted from the database? No, the old values stay and it's more like a marker which denotes: this used to be there but is now gone.
> If not, can I query these stale data I don't think there are standard APIs for doing that. You can probably find out when directly analyzing the data on disk. > and how can I mark a serie stale > by myself? I don't think so. It's supposed to be an internal implementation detail. Can you elaborate what you are trying to accomplish? > Is there more documents about `stale`? Maybe this blog post, the slides and the video provides more insight: https://www.robustperception.io/staleness-and-promql https://de.slideshare.net/brianbrazil/staleness-and-isolation-in-prometheus-20-promcon-2017 https://www.youtube.com/watch?v=GcTzd2CLH7I Kind regards, Christian -- 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/ae13c038-76ff-59b6-2479-06d25cd4f446%40hoffmann-christian.info.
