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Nexus Metrics

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Nexus provides SDK metrics, Cloud metrics, and OSS Cluster metrics in addition to integrated execution debugging.

SDK Metrics

SDK metrics are emitted from a Nexus Worker, including:

• nexus_poll_no_task
• nexus_task_schedule_to_start_latency
• nexus_task_execution_failed Worker
• nexus_task_execution_latency
• nexus_task_endtoend_latency

Cloud Metrics

Temporal Cloud emits OpenMetrics 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 are emitted from an OSS Cluster, including:

• History Service metrics
• Concurrency Limiter metrics
• Frontend Service metrics