Back Pressure
A flow control mechanism where a slow consumer signals upstream producers to slow down. Prevents systems from being overwhelmed by data they can't process.
What is Back Pressure?
A flow control mechanism where a slow consumer signals upstream producers to slow down. Prevents systems from being overwhelmed by data they can't process.
Back Pressure is a advanced concept that sits in the Reliability & Resilience area of system design. Engineers reach for it whenever they need to reason about real-world trade-offs in that space — not just for textbook correctness, but because real production systems at companies like Netflix, Amazon, and Google make these decisions every day.
If you want to go deeper than this definition — with diagrams, code, and a quiz to lock it in — work through the "Back Pressure" lesson linked below. It walks through the why, the mechanism, the trade-offs, and how the giants actually use it in production.
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See also
Related glossary terms you might want to look up next.
Message Queue
A buffer that stores messages between producers and consumers. Messages are processed one by one, in order. Think of it as a to-do list for your services.
Throttling
Slowing down the rate of processing requests instead of rejecting them outright. The gentler cousin of rate limiting.
Rate Limiting
Controlling how many requests a client can make in a given time window. Protects your API from abuse and ensures fair usage.