On 28 Apr 10:13, Brian Brazil wrote: > On Tue, 28 Apr 2020 at 10:06, Julien Pivotto <[email protected]> wrote: > > > On 28 Apr 09:51, Brian Brazil wrote: > > > On Tue, 28 Apr 2020 at 09:33, Julien Pivotto <[email protected]> > > wrote: > > > > > > > Dear all, > > > > > > > > We had another request for a promql function, last_over_time. > > > > > > > > https://github.com/prometheus/prometheus/issues/7179 > > > > https://github.com/prometheus/prometheus/pull/6530 > > > > https://github.com/prometheus/prometheus/pull/1139 > > > > > > > > I would like to see more broadly comments about this - it seems that > > > > there are usescases for this (I needed this - I was lucky to be able to > > > > do it with recording rules - but you can not really do it with > > > > subqueries). > > > > > > > > > > Thus far we've had no valid concrete use cases. The requests thus far > > > appear to have been a mix of misunderstanding of PromQL semantics, and > > > attempting to use Prometheus as an event logging system. > > > > > > What's your use case? > > > > > > Brian > > > > One of our partners have a flaky API ; we don't always get the data we > > need, and have gaps of up to 1 hour every now and then. > > > > This is gauges (number of credits we still have) so only the last value > > we could scrape matters. > > > > Since it is a third party there isn't much we can do about it. We did > > not want to hack the exporter neither. We currently have a recording rule > > but that has drawbacks, e.g. upon prometheus restart. > > > > For resource limit issues, I'd expect min/max over time to cover that > sufficiently. I'd also argue that if an hour has passed with no new data > then either it has already alerted, or it otherwise no longer matters. > The real issue here is the lack of reliability, and I'm not sure if trying > to paper over it really helps. > > Brian
min_over_time and the alerts keeps firing '1 hour' after we add new resources. max_over_time and we are '1 hour' late. last_over_time would really be the best compromise we have there. > > > > > > > > > > > > > > > > > > I know that we are careful when adding new promql functions, but this > > > > seems to be a valid one. > > > > > > > > Maybe we can revisit the conclusion here and add this promql function? > > > > > > > > > > > > -- > > > > (o- Julien Pivotto > > > > //\ Open-Source Consultant > > > > V_/_ Inuits - https://www.inuits.eu > > > > > > > > -- > > > > You received this message because you are subscribed to the Google > > Groups > > > > "Prometheus Developers" 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-developers/20200428083353.GA36342%40oxygen > > > > . > > > > > > > > > > > > > -- > > > Brian Brazil > > > www.robustperception.io > > > > -- > > (o- Julien Pivotto > > //\ Open-Source Consultant > > V_/_ Inuits - https://www.inuits.eu > > > > > -- > Brian Brazil > www.robustperception.io -- (o- Julien Pivotto //\ Open-Source Consultant V_/_ Inuits - https://www.inuits.eu -- You received this message because you are subscribed to the Google Groups "Prometheus Developers" 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-developers/20200428092529.GA106111%40oxygen.
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