# Nexus Metrics

> 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

[Cloud metrics](/cloud/metrics/reference) are emitted by Temporal Cloud, including:

- Caller Namespace
  - RespondWorkflowTaskCompleted \- schedule a Nexus Operation.
- Handler Namespace
  - PollNexusTaskQueue \- get a [Nexus Task](/tasks#nexus-task) to process, for example to start a Nexus Operation.
  - RespondNexusTaskCompleted \- report the Nexus Task was successful.
  - RespondNexusTaskFailed \- report the Nexus Task failed.

## OSS Cluster Metrics

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

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