# Warmup Worker

```
POST 
/v1/sql/warmup
```

Pre-warm a job\_v4 worker for the given dataset combination.

Starts a worker subprocess in the background so datasets are loaded into DuckDB memory before the first SQL query arrives (e.g. when a user lands on the viz page or selects datasets in the creation funnel).

* Returns 202 immediately (fire-and-forget).
* No-op if a healthy worker already exists for this dataset combination.
* Errors are silently swallowed on the backend (best-effort).

## Request[​](#request "Link direto para request")

## Responses[​](#responses "Link direto para Responses")

* 202
* 404
* 422

Successful Response

Not found

Validation Error