There is a setting in HTTP/2 called SETTINGS_MAX_CONCURRENT_STREAMS, if set to 1...

j16sdiz · on April 23, 2019

This is a client side setting and default to 1000 in chrome. The http/1.1 equivalent was 8 or something like that.

floatingatoll · on April 23, 2019

While it is correct to say that it is a client setting, it is also a server setting. The HTTP/2 specification uses the word "peer" since SETTINGS_MAX_CONCURRENT_STREAMS (0x3) is negotiated in both directions as part of the client/server handshakes.

  $ nghttp -v https://www.google.com | grep -C5 SETTINGS_MAX_CONCURRENT_STREAMS
  [  0.076] send SETTINGS frame <length=12, flags=0x00, stream_id=0>
            [SETTINGS_MAX_CONCURRENT_STREAMS(0x03):100]
  [  0.091] recv SETTINGS frame <length=18, flags=0x00, stream_id=0>
            [SETTINGS_MAX_CONCURRENT_STREAMS(0x03):100]

ec109685 · on April 24, 2019

ALB clips this at 128: https://docs.aws.amazon.com/elasticloadbalancing/latest/appl...