Http2

<server_label>/upgrade/success A counter of http2 upgrades and new prior knowledge connections server side.

<client_label>/upgrade/success A counter of http2 upgrades and new prior knowledge connections client side.

<server_label>/upgrade/ignored A counter of http2 upgrades that were ignored due to an unsuitable request.

<client_label>/upgrade/ignored A counter of http2 upgrades that were ignored due to an unsuitable request.

<client_label>/upgrade/attempt A counter of http2 upgrade attempts made by the client.

<server_label>/streams A gauge exposing the number of opened streams on the server.

<client_label>/streams A gauge exposing the number of opened streams on the client.

<client_label>/buffered_streams A gauge exposing the number of buffered streams on the client.

<client_label>/dead_session A counter of the number of closed sessions evicted.

<client_label>/dead_child_transport A counter of the number of child transports that were returned in a dead state.

<client_label>closed_before_upgrade A counter of the number of h2c upgrade transports that were closed before the upgrade had completed.