open_request_count, go back to Mint.HTTP2 module for more information.
In HTTP/2, the number of open requests is the number of requests opened by the client
that have not yet received a
:done response. It's important to note that only
requests opened by the client (with
request/5) count towards the number of open
requests, as requests opened from the server with server pushes (see the "Server push"
section in the module documentation) are not considered open requests. We do this because
clients might need to know how many open requests there are because the server limits
the number of concurrent requests the client can open. To know how many requests the client
can open, see
get_server_setting/2 with the