QoS=1 or QoS=2message has been sent that VerneMQ will wait before retrying when no response is received.
0for no limit. The inflight window serves as a protection for sessions, on the incoming side.
1000. Set to
-1for no limit. This option protects a client session from overload by dropping messages (of any QoS).
-1for no limit. This parameter was named
0.10.*. Note that
0will totally block message delivery from any queue!
-1for no limit, use
0if no messages should be stored.