How significantly to decrease the throughput for Kafka Producer

Safety vs Throughput : Setting MaxInFlight to 1 can significantly decrease the throughput.

var producerConfig = new ProducerConfig
{
      Acks = Acks.All,
      BootstrapServers = "localhost:9092",
      BatchSize = 32768,
      LingerMs = 20,
      CompressionType = CompressionType.Snappy,
      MaxInFlight = 1
};

Maximum number of in-flight requests per broker connection. This is a generic property applied to all broker communication, however it is primarily relevant to produce requests.