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 prometheus-users+unsubscr...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/prometheus-users/33e2d50f-0d9c-46be-a099-2e107765077dn%40googlegroups.com.
