gitlab-org--gitlab-foss/doc/ci/metrics_reports.md

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# Metrics Reports **(PREMIUM)**
> [Introduced](https://gitlab.com/gitlab-org/gitlab/issues/9788) in [GitLab Premium](https://about.gitlab.com/pricing/) 11.10.
Requires GitLab Runner 11.10 and above.
## Overview
GitLab provides a lot of great reporting tools for [merge requests](../user/project/merge_requests/index.md) - [JUnit reports](junit_test_reports.md), [codequality](../user/project/merge_requests/code_quality.md), performance tests, etc. While JUnit is a great open framework for tests that "pass" or "fail", it is also important to see other types of metrics from a given change.
You can configure your job to use custom Metrics Reports, and GitLab will display a report on the merge request so that it's easier and faster to identify changes without having to check the entire log.
![Metrics Reports](img/metrics_reports.png)
## Use cases
Consider the following examples of data that can utilize Metrics Reports:
1. Memory usage
1. Load testing results
1. Code complexity
1. Code coverage stats
## How it works
Metrics are read from the metrics report (default: `metrics.txt`). They are parsed and displayed in the MR widget.
All values are considered strings and string compare is used to find differences between the latest available `metrics` artifact from:
- `master`
- The feature branch
## How to set it up
Add a job that creates a [metrics report](yaml/README.md#artifactsreportsmetrics-premium) (default filename: `metrics.txt`). The file should conform to the [OpenMetrics](https://openmetrics.io/) format.
For example:
```yaml
metrics:
script:
- echo 'metric_name metric_value' > metrics.txt
artifacts:
reports:
metrics: metrics.txt
```