Local retention refers to on-disk retention. You said you set this to 2 days. The local disk retention could be 2 days or 15 days, it doesn't contribute significantly to memory use. Only 2 hours are kept in memory.
On Tue, Apr 14, 2020 at 12:51 PM Thomas Will <[email protected]> wrote: > Thank you, Ben, for replying. "by local retention" I am assuming that you > are talking about the 2hr retention in ram. How it's not gonna affect the > memory use, as we will be storing all the metrics in ram for 2hrs. right? > > On Tuesday, April 14, 2020 at 4:15:12 PM UTC+5:30, Ben Kochie wrote: >> >> Prometheus only keeps up to 2 hours in memory. After this it is always >> written to disk and mmaped. There are no controls for this. The local >> retention time makes (almost) no difference to memory use. >> >> The only control is to reduce the metrics collected. >> >> On Tue, Apr 14, 2020, 12:33 Thomas Will <[email protected]> wrote: >> >>> Hello guys, I am running my Prometheus in a docker container, have set >>> my retention period to be 2days and also enabled Thanos at the back. I have >>> two questions:- >>> >>> 1) For how much time Prometheus stores its metrics in ram and after that >>> sends to the disc? >>> 2) Is there any way to control our ram usage, like based on size or >>> number of metrics, i.e. if ram size increases beyond a threshold, dump the >>> data to the disc. >>> >>> Cheers, all. >>> Thomas Will. >>> >>> -- >>> 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/1a166fbc-3c49-45b4-9dec-361f07f20172%40googlegroups.com >>> <https://groups.google.com/d/msgid/prometheus-users/1a166fbc-3c49-45b4-9dec-361f07f20172%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- > 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/c19411f3-6b25-40af-a096-b98938d945f4%40googlegroups.com > <https://groups.google.com/d/msgid/prometheus-users/c19411f3-6b25-40af-a096-b98938d945f4%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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/CABbyFmop59RWR2qwjh752kQiwzWhw4j7GscUsUA91AvXhLQGgA%40mail.gmail.com.
