Re: [prometheus-users] Re: promql - what is promql for calcuate percetile
On 20.03.23 03:28, Brian Candler wrote:
> > Note - I have no bucket metrics for histogram.
>
> What you say doesn't make sense to me. What you showed *is* a histogram,
> and the metrics *prometheus_rule_evaluation_duration_seconds* *are* the
> buckets.
Strictly speaking, it's a summary, and the metrics labeled with
"quantile" are precalculated
quantiles. Cf. https://prometheus.io/docs/practices/histograms/
> Therefore, if those are the metrics you have, then the 50th percentile is
> simply
> prometheus_rule_evaluation_duration_seconds{quantile="0.5"}
> and the 90th percentile is simply
> prometheus_rule_evaluation_duration_seconds{quantile="0.9"}
>
> There is no need to "calculate" the p50/p90/p99 latencies because you
> already have them.
That's correct. Note that there is no way to further aggregate the
pre-calculated quantile (or change them for example to a different
quantile or to a different time interval).
If you need aggregatability or more flexibility for add-hoc queries,
you have to use an actual histogram in your instrumentation of the
monitored target (either the classic histograms or the new
experimental native histograms).
--
Björn Rabenstein
[PGP-ID] 0x851C3DA17D748D03
[email] bjo...@rabenste.in
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[prometheus-users] Re: promql - what is promql for calcuate percetile
> Note - I have no bucket metrics for histogram.
What you say doesn't make sense to me. What you showed *is* a histogram,
and the metrics *prometheus_rule_evaluation_duration_seconds* *are* the
buckets.
Therefore, if those are the metrics you have, then the 50th percentile is
simply
prometheus_rule_evaluation_duration_seconds{quantile="0.5"}
and the 90th percentile is simply
prometheus_rule_evaluation_duration_seconds{quantile="0.9"}
There is no need to "calculate" the p50/p90/p99 latencies because you
already have them.
On Monday, 20 March 2023 at 08:47:46 UTC Prashant Singh wrote:
> Hi ,
>
> Need to be know what is promql for calculate p50th ,p90th , and p99th
> latency or perctile for bleow metrics
>
> Note - I have no bucket metrics for histogram.
>
>
> # HELP prometheus_rule_evaluation_duration_seconds The duration for a rule
> to execute.
> # TYPE prometheus_rule_evaluation_duration_seconds summary
> prometheus_rule_evaluation_duration_seconds{quantile="0.5"} 6.4853e-05
> prometheus_rule_evaluation_duration_seconds{quantile="0.9"} 0.00010102
> prometheus_rule_evaluation_duration_seconds{quantile="0.99"} 0.000177367
> prometheus_rule_evaluation_duration_seconds_sum 1.623860968846092e+06
> prometheus_rule_evaluation_duration_seconds_count 1.112293682e+09
>
> Thanks
> Prashant
> Thanks,
> Prashant
>
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