> For the complete documentation index, see [llms.txt](https://developer.harness.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.harness.io/continuous-delivery/use-continuous-delivery/verify-deployments/configure-cv/health-sources/google-big-query.md).
# Google Big Query
### Before you begin
This page assumes you have followed the rest of the steps to set up CV. To learn more, go to [Configure CV](/continuous-delivery/use-continuous-delivery/verify-deployments/configure-cv/verify-deployments.md)
### Add BigQuery as a health source
This option is available only if you have configured the service and environment as fixed values.
A Health Source is basically a mapping of a Harness Service to the service in a deployment environment monitored by an APM or logging tool.
1. In **Health Sources**, click **Add**. The **Add New Health Source** settings appear.
2. In **Select health source type**, select **BigQuery**.
3. In **Health Source Name**, enter a name for the Health Source.
4. Under **Connect Health Source**, click **Select Connector**.
5. In **Connector** settings, you can either choose an existing connector or click **New Connector.**
6. Click **Apply Selected**. The Connector is added to the Health Source.
7. In **Select Feature**, select the BigQuery feature to be used.
8. Click **Next**. The **Configuration** tab appears.
9. Click **Add Query**.
10. Enter your **Query Name**.
11. Enter a query in the **Query** text box.
12. Click **Run Query** to retrieve the details. The results are displayed under **Records.**
13. Click **Submit**. The Health Source is displayed in the AI Verify (v1) step.
Optionally, you can click **Get sample log messages** to get a list of sample logs for your query.
You can add one or more Health Sources for each APM or logging provider.