# Alert Monitor Group By with Semantic Mapping to Reduce Changes

> With more view-time control on Alert Monitor, reduce instrumentation changes and save engineering bandwidth.

Source: https://last9.io/changelog/alert-monitors-group-by-with-semantic-mapping-to-reduce-instrumentation-changes/

You can now use Group By to add a hierarchy of information while viewing Alert Monitor. For example, grouping by `region` or `tenant` lets you identify what’s impacting users in Europe or if a specific customer may see downtime.

But with that `As` field in the Group By popup, you’re able to solve a bigger headache.

As teams and products grow, nomenclature starts varying. Depending on where a metric is being emitted from, different labels across metrics can mean the same thing to a team.

For example, the following may all mean to be referring to the same service:

- a `deployment` label in a Kubernetes metric, or
- an `application` label from your client-facing mobile app, or
- a `program` label from a background job

To be able to monitor them together would mean either getting various teams to update the labels to `service` across metrics or adding a new `service` label altogether — either option is a hassle, and the latter leads to increased cardinality as well.

Instead, include `deployment`, `application`, and `program` in the Labels field and `service` in the As field. All fired alerts will now be grouped under `service`.

Note: Group By settings are currently not persisted across sessions. However, they are persisted in the URL, so you can share them with your team members or save them as a bookmark. If you’d like them included in your alert notifications, you can use the [Custom Annotations](https://prometheus.io/docs/prometheus/latest/configuration/configuration/) feature while configuring your alert rules.

### Updates & Fixes:

- Improved ingestion performance for vmagent users
- Updated Channels in an Alert Group’s settings to include a direct link to creating new channels before they can used to configure alert notifications
- Fixed a bug while creating a new Indicator where while viewing the Query Preview, the Open in Explore button would not be visible

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