Hi Aliaksandr, Thanks a lot for the reply, but I think quantile_over_time() will compute percentiles over each series?
So, for example, if I have three different time series A/B/C (representing three instances of the same task T), and I use quantile_over_time(), then I could get "95% CPU usage of A/B/C" separately, but it still won't tell me "95% CPU usage across all instances of T", as far as I can tell. On Mon, Feb 24, 2020 at 10:41 AM Aliaksandr Valialkin <[email protected]> wrote: > Hi Yongjik! > > Try using `quantile_over_time` instead of `quantile`. See > https://prometheus.io/docs/prometheus/latest/querying/functions/#aggregation_over_time > > > On Fri, Feb 14, 2020 at 9:06 PM 'Yongjik Kim' via Prometheus Users < > [email protected]> wrote: > >> Hi, >> >> I have a problem with aggregation. I want to get the CPU usage of a set >> of jobs (each with potentially different start/stop time), over the past >> week, and then get 95% percentile among these values. >> >> So, I can get the raw data points with this: >> >> > rate(cpu_usage{name="myjob"}[5m])[1d:5m] >> >> cpu_usage is an accumulative series (counter?) which records "the amount >> of CPU resource this job has used since it started." So, as far as I >> understand, this gives me a nice list of "average CPU usage for each >> 5-minute interval, for every job and for every interval the job was alive." >> >> So far so good, but then how do I get the 95% percentile of *all these >> values*? >> >> If I try this: >> >> > quantile(0.95, rate(cpu_usage{name="myjob"}[5m])[1d:5m]) >> >> I get: "Error executing query: invalid parameter 'query': parse error at >> char 147: expected type instant vector in aggregation expression, got range >> vector" >> >> I can make it output *some number* by removing [1d:5m], but that's not >> what I want. I don't need 95% percentile at the current instant, but over >> the past week. >> >> Any way to make it work without piping the result through a custom script? >> >> Thanks, >> - Yongjik Kim >> >> -- >> 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/637d706d-e39a-4b0a-8ec3-70bdcc9c3cbc%40googlegroups.com >> <https://groups.google.com/d/msgid/prometheus-users/637d706d-e39a-4b0a-8ec3-70bdcc9c3cbc%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > > > -- > Best Regards, > > Aliaksandr > -- 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/CAFS1%3DORFCLL3QEp7deVWjGrg29wVUTaK5xU%3DETUjWwsyVDvi0g%40mail.gmail.com.
