Set grpc.NettyChannelBuilderOption.keepAliveWithoutCalls to true

[Sandy Sun]

If we overwrite the default value and set grpc.NettyChannelBuilderOption.keepAliveWithoutCalls to true, Will it impact the performance? any one has the real measurements? impact by how much?

[spenc...@google.com]

The keep alive is done with a HTTP/2 ping, so the performance impact is expected to be negligible. I am not aware of any benchmarks specifically on pings. What value are you thinking of using? If it is in the order of seconds or more you have nothing to worry about.