Alert on NaN value

[eem...@gmail.com]

HI,

Is there any way to configure an alert firing when some metric has NaN as value?

thanks!

[Brian Brazil]

On 25 May 2017 at 10:37, <eem...@gmail.com> wrote:

HI,

Is there any way to configure an alert firing when some metric has NaN as value?

The expression x != x should do the trick, as NaN doesn't equal itself.

This seems like an unusual alert though, how are these NaNs occurring?

--

Brian Brazil

www.robustperception.io

[eem...@gmail.com]

Hi Brian,

Works fine your trick, thanks!.

Im using a custom exporter.

It extracts data from a file created by a testing system, that is running like a cron, every 10 min.

The testing system could produce some specific N/A metrics, or not be able to generate the file for some time.

So, Im exporting to NaN in both cases.

N/A --> NaN

no file < 15 min --> NaN

I also have another metric with the timestamp of the last OK metrics. its useful, but it doesnt cover the first case of N/A metrics

[Brian Brazil]

On 25 May 2017 at 11:26, <eem...@gmail.com> wrote:

Hi Brian,

Works fine your trick, thanks!.

Im using a custom exporter.

It extracts data from a file created by a testing system, that is running like a cron, every 10 min.

The testing system could produce some specific N/A metrics, or not be able to generate the file for some time.

So, Im exporting to NaN in both cases.

N/A --> NaN

no file < 15 min --> NaN

I also have another metric with the timestamp of the last OK metrics. its useful, but it doesnt cover the first case of N/A metrics

You should only use NaN when it makes mathematical sense to do so. If you're not able to generate the file, then don't update the file.

Brian

 

El jueves, 25 de mayo de 2017, 11:44:17 (UTC+2), Brian Brazil escribió:

On 25 May 2017 at 10:37, <eem...@gmail.com> wrote:

HI,

Is there any way to configure an alert firing when some metric has NaN as value?

The expression x != x should do the trick, as NaN doesn't equal itself.

This seems like an unusual alert though, how are these NaNs occurring?

--

Brian Brazil

www.robustperception.io

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Brian Brazil

www.robustperception.io