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docs(concurrency): note that a large single-group backlog slows claims #69

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psteinroe merged 1 commit into from
Oct 12, 2026
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docs(concurrency): note that a large single-group backlog slows claims #69

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2 changes: 2 additions & 0 deletions docs/content/task-execution/concurrency.md
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Expand Up @@ -56,3 +56,5 @@ Child invocations use the `group` option supplied to `ctx.invoke`. Dynamic cron
## Group concurrency

`group` may be supplied when invoking a task. `groupConcurrency` limits active executions within each `(queue, task, group)` scope; ungrouped invocations bypass that limit. Task and group limits compose and are intentionally soft across concurrent workers.

A claim skips the pending executions of full groups one by one, so a very large backlog in a single group slows every claim of that task until the backlog drains. Spread bulk work across groups, or move it to a separate task or queue.
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