Streaming Flow Control & Backpressure
Master how gRPC streams manage flow control and backpressure so fast producers never overwhelm slow consumers across long-lived bidirectional connections.
Why Flow Control Matters
In a stream, a producer can generate messages far faster than a consumer reads them. Without limits, buffers grow unbounded and memory explodes.
Flow control is the mechanism that keeps producer and consumer in balance.
HTTP/2 Flow Control Windows
gRPC rides on HTTP/2, which has built-in flow control. Each stream and the whole connection has a window — a credit of bytes the sender may transmit.
As the receiver consumes data, it sends WINDOW_UPDATE frames to replenish credit.
All lessons in this course
- Server Streaming Explained
- Client Streaming Explained
- Bidirectional Streaming
- Streaming Flow Control & Backpressure