On Friday, 16 October 2020 03:32:29 UTC+1, li yun wrote: > > Because my data is collected every 5 minutes, I use sum_over_time. If I > don’t use it, it may not be possible to draw the graph at some points. > > That doesn't make sense to me. Prometheus will look back up to 5 minutes to find a data point anyway.
You're correct that if you sample at 5 minute intervals, and you do sum_over_time[5m], then *normally* the sum_over_time will sum exactly one data point. If the samples aren't *exactly* 5 minutes apart then sometimes it will return zero, and sometimes it will sum two data points, both of which are silly. Prometheus recommends a *minimum* polling time of 2 minutes, so that if one scrape is missed, the timeseries does not go scale (i.e. the last point can be found). -- 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/dd1f7c8c-0086-4506-be2b-8023b281bc9fo%40googlegroups.com.
