This actually refers to the HTTP/2 flow control window: https://http2.github.io/http2-spec/#FlowControl
Yes, increasing the flow window to a larger value will allow the other end of the connection to continue writing even if we are not able to keep up with the work. In HTTP/2, there is a connection level flow control window and each stream has its own flow control window. The setting you mentioned refers to the connection level flow control window. Even if the connection level flow control window is exhausted, non-DATA frames such as SETTINGS can still be sent on the connection, which is why it exists instead of relying on the TCP level window. On Tue, Dec 5, 2017 at 12:41 PM, <thas.hi...@gmail.com> wrote: > I am using NettyChannelBuilder > <https://grpc.io/grpc-java/javadoc/io/grpc/netty/NettyChannelBuilder.html> > on my client and NettyServerBuilder > <https://grpc.io/grpc-java/javadoc/io/grpc/netty/NettyServerBuilder.html> > on my server. I notice when I increase the flowControlWindow option on the > client and server, e.g: > > .flowControlWindow(NettyServerBuilder.DEFAULT_FLOW_CONTROL_WINDOW * 10) > > > I notice higher throughput ability in my stream, I believe this is because > it increases the TCP flow control window so more bytes can be > in-flight/buffered on each side. > However are there any possible downsides to increasing this value? What > actually happens on a lower level? Does it just increase the memory > allocated to the internal buffers? > > Thanks in advance! > > -- > You received this message because you are subscribed to the Google Groups " > grpc.io" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to grpc-io+unsubscr...@googlegroups.com. > To post to this group, send email to grpc-io@googlegroups.com. > Visit this group at https://groups.google.com/group/grpc-io. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/grpc-io/93e6301e-0a8b-4201-991b-a0d7865ea068%40googlegroups.com > <https://groups.google.com/d/msgid/grpc-io/93e6301e-0a8b-4201-991b-a0d7865ea068%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- Spencer Fang -- You received this message because you are subscribed to the Google Groups "grpc.io" group. To unsubscribe from this group and stop receiving emails from it, send an email to grpc-io+unsubscr...@googlegroups.com. To post to this group, send email to grpc-io@googlegroups.com. Visit this group at https://groups.google.com/group/grpc-io. To view this discussion on the web visit https://groups.google.com/d/msgid/grpc-io/CAK%3D-x_79qMSqoucLCr6s0z5VmXohreu_NRPVhCS3wXeZsb456g%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
