[grpc-c++] How to change HTTP/2 default window size?

[yihao yang]

Hi, all

I wonder if the window size will affect the throughput of unary RPCs.

And how to configure the window size in GRPC?

Thanks,

Yihao

[yihao yang]

Could any one help?

在 2017年10月13日星期五 UTC-7下午1:09:17，yihao yang写道：

[Noah Eisen]

Hi,

Flow control is very intrinsic to all http2 behavior, so it very well could have throughput implications. gRPC's transport layer does a lot of automatic tuning of flow control values based on BDP estimate. However, these numbers take time to settle, so if you are benchmarking, ensure you have a sufficient warm up period before starting measurements.

If you do want to make manual changes, you can tune the initial window size by setting the channel arg GRPC_ARG_HTTP2_STREAM_LOOKAHEAD_BYTES, which is found here.

Hope this helps,

Noah

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