1. Now 2. Uh, not sure, probably better to specify one 😬 3. Probably not, end might default to "now" implicitly? 4. They are different – there are two different types involved here. `http_request_total` returns an instant vector: a 1-dimensional list of the value at that instance for each label combination. `http_request_total[1m]` is a matrix: for each label combination, it has a list of values going back 1 minute with some automatic step IIRC. Normally you don't handle these directly; they are used e.g. by rate() to calculate the rate of counters over this period. 5. It us returning this matrix.
The query_range API is an optimized way to make many "instant" requests at once. You can get logically the same results by calling the query API many times with different time stamps. For each instant, the response can be of different types, although in most common queries they will be of the "instant vector" type because that is what you can build a graph from. /MR On Mon, Nov 16, 2020, 04:42 kiran <[email protected]> wrote: > Hello all, > > I am new to PromQL and would like to understand as I could not find things > (unless I am missing it) here: > https://prometheus.io/docs/prometheus/latest/querying/api/ > > 1. For an instant query, if I dont give timestamp, then what is the > logic/default timestamp. > 2. For range query, what is the default step value if no value is provided? > 3. For range query, are start, and end parameters optional? > 4. I see that time duration can be given after the metric in square > brackets (e.g http_requests_total[5m]). Is giving time duration this way > the same as giving range query with equivalent unix timestamp values for > start and end parameters? > > So I am trying to understand if both the queries below are same and yield > same result(including result format): > > /api/v1/query_range?query=<metricname>[<duration>] > /api/v1/query_range?query= > <metricname>&start=<strartunixtimestamp>&end=<endunixtimestamp> > > 5. I see that giving duration in square brackets is working for instant > query as well(e.g /api/v1/query?query=<metricname>[<duration>]), but not > sure what timeseries it is retrieving. Any valid cases to use this way? > > > -- > 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/CAOnWYZVk%3D-MRzawQ_BHamf_vtS-7960uM5kigO%3DtE559RaGoEw%40mail.gmail.com > <https://groups.google.com/d/msgid/prometheus-users/CAOnWYZVk%3D-MRzawQ_BHamf_vtS-7960uM5kigO%3DtE559RaGoEw%40mail.gmail.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/CAMV%3D_gZCJhn76rfu8%3D0cudDvdMijhAA64fruNxc29%3DTbfOULkw%40mail.gmail.com.
