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_metric-registrar.html.md.erb
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The PAS tile includes a configuration pane for the Metric Registrar. You can configure the Metric Registrar in the following ways:
* Enable
* Edit default scraping interval
* Add blacklisted tags
### <a id="disable"></a> Enable the Metric Registrar
The PAS tile does not deploy the Metric Registrar by default. To enable the Metric Registrar, disable the **Disable Metric Registrar** checkbox.
### <a id="scraping-interval"></a> Edit Default Scraping Interval
The scraping interval defines how often the Metric Registrar polls custom metric endpoints. The default is 35 seconds. To change the scraping interval, edit the **Endpoint Scraping Interval** field.
### <a id="blacklisted-tags"></a> Add Blacklisted Tags
To prevent the Metric Registrar from consuming the value of a metric or event tag, you can add the tag to the **Blacklisted Tags** field. For example, if you tag your metrics with a `customer_id`, you may want to add `customer_id` to the list of blacklisted tags. The field accepts a comma-separated list.
By default, the following tags are blacklisted to prevent interference with other products like PCF Metrics that use and rely on such tags.
- `deployment`
- `job`
- `index`
- `id`