Delivery & reliability
Backpressure
Backpressure is a system's response when data arrives faster than the next stage can process it, preventing work or buffered messages from growing without control.
Also found under: Slow consumer, Send buffer
How it works
A slow client can fall behind even when the server publishes successfully. Responses include bounded queues, rejecting work, reducing update frequency or disconnecting a lagging consumer. The right choice depends on whether each event matters or only the newest state is useful.
In a Pubb integration
Treat Pubb rate limits and client processing speed as separate parts of capacity planning. Keep payloads small and avoid assuming that accepted publications create an unlimited buffer for a slow or offline subscriber.
Explore plans and capacityA practical example
For a rapidly changing cursor, render the most recent position instead of performing expensive UI work for every intermediate update. Store important business changes in your backend.