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Instead of storing discovered labels on every target, recompute them if
required. The `Target` struct now needs to hold some more data required
to recompute them, such as ScrapeConfig.
This moves the load from every Prometheus all of the time, to just when
someone views Service Discovery in the UI.
The way `PopulateLabels` is used changes; you are no longer expected to
call it with a part-populated `labels.Builder`.
The signature of `Target.Labels` changes to take a `labels.Builder`
instead of a `ScratchBuilder`, for consistency with `DiscoveredLabels`.
This will save a lot of work when many targets are filtered out in
relabeling. Combine with `keep_dropped_targets` to avoid ever computing
most labels for dropped targets.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
Preparation for release 3.1.
Did not update Kubernetes as it forces Go to version 1.23, and we like to support 2 latest versions.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
Refactoring in prevision of https://github.com/prometheus/prometheus/pull/15681
By moving the `eval` function outside of the for loop, we can modify the rule execution order more easily (without huge git changes)
Signed-off-by: Julien Duchesne <julien.duchesne@grafana.com>
* [ENHANCEMENT] TSDB: Improve calculation of space used by labels
The labels for each series in the Head take up some some space in the
Postings index, but far more space in the `memSeries` structure.
Instead of having the Postings index calculate this overhead, which is
a layering violation, have the caller pass in a function to do it.
Provide three implementations of this function for the three Labels
versions.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
This addresses extreme slowness when you have thousands of rules in
potentially hundreds of rule groups. It can still be a bit slow even with
pagination and infinite scroll for very large use cases, but it's much
better already than before.
Fixes https://github.com/prometheus/prometheus/issues/15551
Signed-off-by: Julius Volz <julius.volz@gmail.com>
* feat(ruler): Add new `RuleEvaluationTimeSum` field to groups
Coupled with a metric: `rule_group_last_rule_duration_sum_seconds`
This will give us more observability into how fast a group runs with or without concurrency
Signed-off-by: Julien Duchesne <julien.duchesne@grafana.com>
* Update rules/group.go
Co-authored-by: gotjosh <josue.abreu@gmail.com>
Signed-off-by: Julien Duchesne <julienduchesne@live.com>
Signed-off-by: Julien Duchesne <julien.duchesne@grafana.com>
* Apply suggestions from code review
Co-authored-by: gotjosh <josue.abreu@gmail.com>
Signed-off-by: Julien Duchesne <julienduchesne@live.com>
Signed-off-by: Julien Duchesne <julien.duchesne@grafana.com>
* Remove `in seconds`. A duration is a duration
Signed-off-by: Julien Duchesne <julien.duchesne@grafana.com>
---------
Signed-off-by: Julien Duchesne <julien.duchesne@grafana.com>
Signed-off-by: Julien Duchesne <julienduchesne@live.com>
Co-authored-by: gotjosh <josue.abreu@gmail.com>
The dependency map being empty meant that all the rules were being set as having no dependencies or dependents. Which is the opposite of what we want
Added two new tests that verify the behavior, they failed before the fix, running all the rules concurrently
Signed-off-by: Julien Duchesne <julien.duchesne@grafana.com>
Add test for `absent`, `absent_over_time` and `deriv` func with histograms
Signed-off-by: Neeraj Gartia <neerajgartia211002@gmail.com>
---------
Signed-off-by: Neeraj Gartia <neerajgartia211002@gmail.com>
