> For AI agents: the complete documentation index is available at /bull-board/llms.txt, the full documentation bundle is available at /bull-board/llms-full.txt.

# Global concurrency

BullMQ supports a global cap on concurrent jobs across all workers for a queue. The dashboard can read and change it.

## Set from the UI

Open the queue's actions dropdown, pick **Set concurrency**, enter a number. The current value is shown in the queue info panel, under **Global concurrency**.

Bull-board calls `Queue.setGlobalConcurrency(n)` on your behalf. Workers respect the new cap on their next job pickup. Setting it to 0 removes the limit.

## Set in code

```ts
await queue.setGlobalConcurrency(5);
```

The value is stored in Redis so any worker across any process sees it.

Bull-only queues: global concurrency isn't supported. The UI hides the control.

## Read-only mode

Read-only mode disables the control. If you want stakeholders to see the number but not change it, `readOnlyMode: true` is the switch.