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# Generate Sample Prometheus Data
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This command will run Prometheus queries for each of the metrics of a specific environment
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for a series of time intervals: 30 minutes, 3 hours, 8 hours, 24 hours, 72 hours, and 7 days
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to now. The results of each of query are stored under a `sample_metrics` directory as a yaml
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file named by the metric's `identifier`. When the environmental variable `USE_SAMPLE_METRICS`
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is set, the Prometheus API query is re-routed to `Projects::Environments::SampleMetricsController`
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which loads the appropriate data set if it is present within the `sample_metrics` directory.
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- This command requires an id from an Environment with an available Prometheus installation.
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**Example:**
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```shell
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bundle exec rake gitlab:generate_sample_prometheus_data[21]
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```
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