The TCP proxy filter emits both its own downstream statistics as well as many of the cluster upstream statistics where applicable. The downstream statistics are rooted at tcp.<stat_prefix>. with the following statistics:
|Total number of connections handled by the filter.
|Number of connections for which no matching route was found.
|Total bytes written to the downstream connection.
|Total bytes currently buffered to the downstream connection.
|Total number of times flow control paused reading from downstream.
|Total number of times flow control resumed reading from downstream.