Flowcontrol settings in grpc C++

[Sree Kuchibhotla]

Hi folks,

I had a few questions about Flow control settings in C++.

- What is the default flow control window size? (as per the RFC, the initial flow control window size (per connection) is 64k which could be later adjusted with WINDOW_UPDATE messages). Does gRPC also use this as the default window size per connection ?

- Can a C++ application change the flow control window sizes ? (per connection and per stream sizes)? - I remember there was a channel arg for this but can't find details in the code.

We are trying to debug a performance issue with large 1MB messages in a bidi stream and want to rule out that possibility that this is due to grpc flow control (i.e we'd like to set a very large window size).

thanks,

Sree