SigNoz is an open-source APM. It helps developers monitor their applications & troubleshoot problems, an open-source alternative to DataDog, NewRelic, etc.

SigNoz Community

```SELECT DISTINCT JSONExtractString(labels, 'job') AS job
FROM signoz_metrics.distributed_time_series_v2
WHERE metric_name = 'gitstart_engine_prom_ex_prom_ex_status_info'```
<https://signoz.io/docs/userguide/manage-variables/#supported-variables-types>

Are you sure the metric and label exist in your sending data?

Aaa it doesn’t return data either in grafana