optional int64 backlog_size = 5 [default=10485760];
optional int64 prebuffering_bytes = 10 [default=0];
optional int64 bytes_received = 3;
optional int64 backlog_size = 5 [default=10485760];
optional int64 prebuffering_bytes = 10 [default=0];
optional int64 bytes_received = 3;