/code> incremented for every gRPC message sent from a server.</p></li></ul><p>For TCP traffic, Istio generates the following metrics:</p><ul><li><p><strong>Tcp Bytes Sent</strong> (<code>istio_tcp_sent_bytes_total</code>): This is a <code>COUNTER</code> which measures the size of total bytes sent during response in case of a TCP
connection.</p></li><li><p><strong>Tcp Bytes Received</strong> (<code>istio_tcp_received_bytes_total</code>): This is a <code>COUNTER</code> which measures the size of total
bytes r