celery.task.prefetch_time

Time from receive to start

Dimensions:None

Technical Annotations (7)

Configuration Parameters (5)

task_send_sent_eventrecommended: True

Required to track queue wait time metrics

worker_send_task_eventsrecommended: True

Enables Flower and event-based monitoring

task_track_startedrecommended: True

Tracks when tasks actually begin execution

worker_prefetch_multiplierrecommended: 4

Balance throughput and latency, affects queue drainage rate

worker_max_tasks_per_childrecommended: 1000

Prevents memory leaks that can slow workers

Technical References (2)

message brokercomponentenqueue and dequeue timesconcept

Switching from RabbitMQ to Redis reduces message broker latency by 20%info

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P95 task completion should not exceed 4x expected execution intervalwarning

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Missing task_send_sent_event prevents queue wait time visibilitywarning

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Queue backlog exceeds 100 tasks indicating worker capacity shortagewarning

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