# IS_ONE_PROCESS variable · @imqueue/pg-pubsub

Source: https://imqueue.org/api/pg-pubsub/latest/pg-pubsub.is_one_process/
Published: 2026-08-01
Author: @imqueue maintainers (https://github.com/imqueue)
Package: @imqueue/pg-pubsub 3.0.5 — generated reference, not hand-written

Default for `PgPubSubOptions.singleListener` — on.

With it on, an inter-process lock elects exactly ONE process to receive each channel's notifications, which is what makes scaling out safe: LISTEN/NOTIFY delivers to every listening connection, so without the lock every replica handles every message. Turn it off only when you genuinely want a broadcast to all replicas.

**Signature:**

```typescript
IS_ONE_PROCESS = true
```