But my exporter is exporting the data every 15min after some processing
,and we are deleting the data as soon as Prometheus scrapes to avoid
registering of same metric after 15minutes,as this a limitation with
Prometheus go client. We need to unregister to avoid registering of same
metric.
If Prometheus scrape every 1minutes, then next minute there will be no data
till next 15minute.
How can we resolve this sync issue?
On Sat, Jan 23, 2021, 2:49 PM Ben Kochie <sup...@gmail.com> wrote:
> You need to scrape data faster than 5 minutes. 2 minutes is the
> recommended max to avoid stale data. Prometheus gets less efficient when
> you scrape slower than 1 minute.
>
> On Sat, Jan 23, 2021 at 8:14 AM akshay sharma <sharmaakshay...@gmail.com>
> wrote:
>
>> Hi,
>>
>> I've one some queries wrt to prometheus scraping and evaluating intervals.
>>
>> *Queries as follows.*
>> 1)
>> Say a prometheus job with *scrape interval 10 mins and evaluation
>> interval 5 mins*, has scraped metrics at at t1, when the same is *queried
>> on prometheus UI, as an instant vector, it is visible for around 3 minutes
>> 30 seconds* (Note:*Here I am querying repeatedly for 3 minutes 30
>> seconds*), at say approximately 4th minute, when I query the same *I am
>> seeing no data. And even if I query the same for a range vector
>> metric_name[5m]*, I don't see the metrics (Note: Here, prometheus says,
>> last s crape was around 4 minutes ago), but the I see the metrics when I
>> give metric_name[10m]. Please explain the behaviour.
>>
>> No data, when executing *metric_name(instant vector)*
>> ElementValue
>> *no data*
>>
>> 2)
>>
>> This is* my Prometheus alert rule*
>>
>> throughput{instance="x.x.x.x:xxxx"} > 100
>>
>> After *alert** fired once, when the metric data missing for more than 1
>> minute, then alert will resolved.* Is there any way to avoid this?
>> Basically, *I do not want a resolved alert, when there is no metrics.*
>>
>>
>> 3)
>> Say, *there are 2 jobs, for one job, I need almost continuous
>> monitoring, so, scrape interval is 1 min, and global evaluation interval is
>> 1 min, there is another job which scrapes metrics at an interval of 10
>> mins, and since evaluation interval is always global, I think evaluation
>> for the second job also is happening every 1 min, even though there are no
>> metrics scraped, and the evaluation results in no_data *?. This will
>> cause a problem in alerting as I mentioned above. *Isn't it possible to
>> have evaluation interval specific to job? Request you to provide some
>> solution*.
>>
>>
>> *Thanks,*
>>
>> *Akshay*
>>
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>> .
>>
>
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