Removal of "id"

[Senthil]

We noticed that Prometheus is taking huge memory and slow. So by referring to the internet [https://www.robustperception.io/dropping-metrics-at-scrape-time-with-prometheus/] we removed the "id" using the below lines. 

    metric_relabel_configs:

    - source_labels: ['id']
      regex: '.*'
      action: drop

But that removed all columns, how we can remove only the Id? 

Thanks

[Julien Pivotto]

Please try

- regex: 'id'
action: labeldrop


but make sure the metrics stays unique after removing the label.


Regards,

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Julien Pivotto
@roidelapluie

[Senthil]

So like this?

    metric_relabel_configs:

    - source_labels: ['id']
      regex: 'id'
      action: labeldrop

[Julien Pivotto]

On 23 Jun 09:13, Senthil wrote:
> So like this?
>
> metric_relabel_configs:
> - source_labels: ['id']
> regex: 'id'
> action: labeldrop

Source labels is not used with labeldrop.

> To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/8024bcff-3538-4cbf-aa43-177a981d145an%40googlegroups.com.


--
Julien Pivotto
@roidelapluie

[Senthil]

So, what will be the correct syntax? How to drop "id" alone? any document link to refer. 

    metric_relabel_configs:

    - source_labels: ['id']
      regex: 'id'
      action: labeldrop

or

    metric_relabel_configs:

    - regex: 'id'
      action: labeldrop

[Brian Candler]

> So, what will be the correct syntax? How to drop "id" alone? any document link to refer.

The correct syntax is exactly what Julien posted before, under the heading "Please try".  This will drop the "id" label only.

The documentation is here: https://prometheus.io/docs/prometheus/latest/configuration/configuration/#relabel_config

<relabel_action> determines the relabeling action to take:

...

• labeldrop: Match regex against all label names. Any label that matches will be removed from the set of labels.