DEVOPS
Replicate Cold-Start Watchdog with Warm-Pool Nudge
Watches Replicate prediction latency on a schedule, and when cold-start times cross your threshold it fires warm-up predictions to keep the model pool hot.
How it runs
The automated pipeline, trigger to output.
- TriggerEvery 3 minutes (schedule)
- ActionFetch recent predictions + boot/predict timingsReplicate
- LogicCold-start latency above threshold?
- ActionSubmit warm-up prediction to keep worker hotReplicate
- OutputEmit cold-start latency metric to DatadogDatadog
What it does
This workflow keeps a Replicate-hosted model endpoint warm by detecting cold-start latency and proactively nudging the model with a cheap warm-up prediction. It runs on a fixed interval, measures the boot vs. predict time on recent runs, and only acts when latency drifts above your comfort line — so you avoid both cold starts and wasteful always-on spend.
When to use it
Use it for any Replicate endpoint with bursty, user-facing traffic where the first request after idle is painfully slow. Ideal when you can't justify a permanent dedicated instance but still owe users sub-second-ish responses during business hours.
How it works
A scheduled trigger fires every few minutes. The flow pulls recent predictions from Replicate and reads their `metrics.predict_time` and boot/setup time. A logic step compares the measured cold-start latency against your threshold. If it's over, an action submits a minimal warm-up prediction to Replicate to keep a worker resident. Every cycle emits a latency metric to Datadog so you can chart cold-start frequency and tune the threshold over time.
Set it up
What you configure once, before turning it on.
- 1Connect ReplicateImage, video, and model inference.
- 2Connect DatadogMetrics, traces, log search.
- 3Set each agent's modelWe leave models unset so you pick the tier — fast + cheap, or top-quality.
- 4Tune it to your dataEdit the prompts, filters, and field mappings so it matches how your team works.
- 5Test, then turn it onRun once against a sample, confirm the output, then enable the trigger.
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