Prometheus: Introduce series limit configuration (#107038)

* introduce series limit configuration * add docs
2025-06-21 15:40:52 +02:00
parent 18757952eb
commit e99e879fe1
16 changed files with 154 additions and 80 deletions
@@ -214,6 +214,7 @@ Following are optional configuration settings you can configure for more control
 - **Custom query parameters** - Add custom parameters to the Prometheus query URL, which allow for more control over how queries are executed. Examples: `timeout`, `partial_response`, `dedup`, or `max_source_resolution`. Multiple parameters should be joined using `&`.
 - **HTTP method** - Select either the `POST` or `GET` HTTP method to query your data source. `POST`is recommended and selected by default, as it supports larger queries. Select `GET` if you're using Prometheus version 2.1 or older, or if your network restricts `POST` requests.
  Toggle on
+- **Series limit** - Number of maximum returned series. The limit applies to all resources (metrics, labels, and values) for both endpoints (series and labels). Leave the field empty to use the default limit (40000). Set to 0 to disable the limit and fetch everything — this may cause performance issues. Default limit is 40000.
 - **Use series endpoint** - Enabling this option makes Grafana use the series endpoint (/api/v1/series) with the match[] parameter instead of the label values endpoint (/api/v1/label/<label_name>/values). While the label values endpoint is generally more performant, some users may prefer the series endpoint because it supports the `POST` method, whereas the label values endpoint only allows `GET` requests.

 **Exemplars:**