hello,
max_over_time(up[2d]) == 0 is giving me the info like ...for the last two
days if the server goes down for 1 minute also it was displaying in the
graph which I don't want. I want the information that for the last "X" days
it should be completely in an unreachable state.
Thanks & regards,
Bharath Kumar.
On Tuesday, 16 August 2022 at 12:47:03 UTC+5:30 Brian Candler wrote:
> If the metric is 0, 1, 0, 1, 1, 0 ... then max_over_time will be 1, if
> the time period in question covers those values.
> If the metric is 0, 0, 0, 0, 0, 0 ... then max_over_time will be 0.
>
> If you enter an expression like
>
> max_over_time(up{instance=~"some_instance_name"}[2d])
>
> and *draw a graph of it*, then you need to understand what that graph
> represents. On the X axis is time; this is the time the expression was
> evaluated at. The expression itself looks at the 2 days of data *up to and
> including that time*: that is, the range vector up[2d] reads all data in
> the database between T and T-2d.
>
> For example, if there's a point on the graph where the X axis is 15 Aug
> 12:00, and the Y axis is 1, it means that the max_over_time between 13 Aug
> 12:00 and 15 Aug 12:00 was 1. This in turn implies that there was at least
> one 1 value in that 2d period. It will only show 0 if *all* the values in
> that period were 0.
>
> If that doesn't do what you want, then you'll have to describe exactly
> what you see more clearly, with actual concrete queries and responses, and
> explain why it is different to what you expect. Otherwise, only you can
> see the data in front of you, so it's up to you to understand why your
> query isn't doing what you expect.
>
> > But I want only unreachable state servers over a period of time?
>
> That will be those where max_over_time(...) is zero, and you can filter
> down to just those servers with an expression like this:
>
> max_over_time(up[2d]) == 0
>
> If you graph this expression, then all the data points will be zeros, but
> the points will appear and disappear over time. They will be present at
> time T only if all the values in the period T-2d to T were 0. If that's
> not the case, then the point will not be displayed.
>
--
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/33e2d50f-0d9c-46be-a099-2e107765077dn%40googlegroups.com.
