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docs/stream-aggregation.md: remove superflouous output_relabel_configs from the config example for histogram aggregation

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Aliaksandr Valialkin 2024-03-02 03:36:00 +02:00
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@ -339,9 +339,6 @@ metrics with different `vmrange` or `le` labels. As they're counters, the applic
interval: 1m
without: [instance]
outputs: [total]
output_relabel_configs:
- source_labels: [__name__]
target_label: __name__
```
This config generates the following output metrics according to [output metric naming](#output-metric-names):
@ -352,15 +349,12 @@ http_request_duration_seconds_bucket:1m_without_instance_total{le="0.2"} value2
http_request_duration_seconds_bucket:1m_without_instance_total{le="0.4"} value3
http_request_duration_seconds_bucket:1m_without_instance_total{le="1"} value4
http_request_duration_seconds_bucket:1m_without_instance_total{le="3"} value5
http_request_duration_seconds_bucket:1m_without_instance_total{le="8"} value6
http_request_duration_seconds_bucket:1m_without_instance_total{le="20"} value7
http_request_duration_seconds_bucket:1m_without_instance_total{le="60"} value8
http_request_duration_seconds_bucket:1m_without_instance_total{le="120"} value9
http_request_duration_seconds_bucket:1m_without_instance_total{le="+Inf" value10
http_request_duration_seconds_bucket:1m_without_instance_total{le="+Inf" value6
```
The resulting metrics can be used in [histogram_quantile](https://docs.victoriametrics.com/MetricsQL.html#histogram_quantile)
The resulting metrics can be passed to [histogram_quantile](https://docs.victoriametrics.com/MetricsQL.html#histogram_quantile)
function:
```metricsql
histogram_quantile(0.9, sum(rate(http_request_duration_seconds_bucket:1m_without_instance_total[5m])) by(le))
```
@ -372,7 +366,6 @@ have no such requirement.
See [the list of aggregate output](#aggregation-outputs), which can be specified at `output` field.
See also [histograms over input metrics](#histograms-over-input-metrics) and [quantiles over input metrics](#quantiles-over-input-metrics).
## Output metric names
Output metric names for stream aggregation are constructed according to the following pattern:
@ -414,6 +407,14 @@ For example, the following config removes the `:1m_sum_samples` suffix added [to
regex: "(.+):.+"
```
Another option to remove the suffix, which is added by stream aggregation, is to add `keep_metric_names: true` to the config:
```yaml
- interval: 1m
outputs: [sum_samples]
keep_metric_names: true
```
## Aggregation outputs
The aggregations are calculated during the `interval` specified in the [config](#stream-aggregation-config)