Concurrency is the number of jobs that can execute at the same time. When capacity is occupied, new work can wait in the queue rather than execute immediately.

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Interpret a delay

Check whether a run is queued, executing or paused inside the mission. A busy execution queue, a provider rate limit and a human approval pause require different responses.

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Worker capacity

Operators set worker concurrency and replica counts for the deployment. The underlying source default for AP_WORKER_CONCURRENCY is 5. A concurrency of 1 with separate resource-capped worker containers gives a different isolation boundary from five jobs sharing one worker. Use production setup and worker architecture to choose capacity. More workers do not remove an external provider’s quota.

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Command Center limits

Some builds expose a per-project maximum concurrent jobs setting. Confirm that it is supported and enforced before relying on it. Native embedding JWT concurrency pools and worker-group assignment are excluded from the initial Community guide.

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Investigate persistent queues

Check worker health, database and Redis reachability, error logs and job volume. A queued job cannot progress without functioning workers and its required infrastructure. Use the queue dashboard when configured.