Does RoadRunner http has output buffering feature?

[dmitryuk]

Hello. Does Roadrunner has output buffering feature like nginx (default on)?

[rustatian]

Hey @dmitryuk 👋🏻
No, RR sends all data immediately w/o buffering.

[dmitryuk]

But if client is too slow to get response it looks like worker will be busy to process another requests

[rustatian]

Workers and clients are separate entities. If the worker responded to RR, it is RR's responsibility to send the response to the client. It is done in a separate thread. If the workers respond to the next request, that response will be processed in another separate thread.

[dmitryuk]

My issue is related for requests from one service (any backend) to second (RoadRunner) directly inside kubernetes cluster.
So RoadRunner sometimes can't answer with timeout 2 seconds, but in logs the Roadrunner Application (Symfony) answered in tens milliseconds.
After I changed second backend in chain nginx + RoadRunner the problem gone

[rustatian]

You need metrics, logs. Check internal RR's queue size (metric).

[dmitryuk]

Queue size most time max 1