# Nexus Metrics

> For the complete documentation index, see [llms.txt](https://docs.temporal.io/llms.txt).
> Any documentation page is available as raw Markdown by appending `.md` to its URL.

> Learn about available metrics emitted by Temporal Nexus.

Nexus provides SDK metrics, Cloud metrics, and OSS Cluster metrics in addition to integrated [execution debugging](/nexus/execution-debugging).

## SDK Metrics

[SDK metrics](/references/sdk-metrics) are emitted from a Nexus Worker, including:

- [nexus_poll_no_task](/references/sdk-metrics#nexus_poll_no_task)
- [nexus_task_schedule_to_start_latency](/references/sdk-metrics#nexus_task_schedule_to_start_latency)
- [nexus_task_execution_failed	Worker](/references/sdk-metrics#nexus_task_execution_failed)
- [nexus_task_execution_latency](/references/sdk-metrics#nexus_task_execution_latency)
- [nexus_task_endtoend_latency](/references/sdk-metrics#nexus_task_endtoend_latency)

## Cloud Metrics

Temporal Cloud emits [OpenMetrics metrics](/cloud/metrics/openmetrics/metrics-reference#nexus-metrics) for both sides of a Nexus call:

- Caller-side Nexus Operation metrics report completion outcomes and schedule-to-close, schedule-to-start, and start-to-close latency.
- Handler-side Nexus request metrics report request rates, errors, and latency.

## Self-hosted metrics

[Cluster metrics](/references/cluster-metrics#nexus-metrics) are emitted from an OSS Cluster, including:

- History Service metrics
- Concurrency Limiter metrics
- Frontend Service metrics