.. _config_listener_stats: Statistics ========== Listener -------- Every listener has a statistics tree rooted at *listener.
.* with the following statistics: .. csv-table:: :header: Name, Type, Description :widths: 1, 1, 2 downstream_cx_total, Counter, Total connections downstream_cx_destroy, Counter, Total destroyed connections downstream_cx_active, Gauge, Total active connections downstream_cx_length_ms, Histogram, Connection length milliseconds downstream_cx_overflow, Counter, Total connections rejected due to enforcement of listener connection limit downstream_pre_cx_timeout, Counter, Sockets that timed out during listener filter processing downstream_pre_cx_active, Gauge, Sockets currently undergoing listener filter processing global_cx_overflow, Counter, Total connections rejected due to enforecement of the global connection limit no_filter_chain_match, Counter, Total connections that didn't match any filter chain ssl.connection_error, Counter, Total TLS connection errors not including failed certificate verifications ssl.handshake, Counter, Total successful TLS connection handshakes ssl.session_reused, Counter, Total successful TLS session resumptions ssl.no_certificate, Counter, Total successful TLS connections with no client certificate ssl.fail_verify_no_cert, Counter, Total TLS connections that failed because of missing client certificate ssl.fail_verify_error, Counter, Total TLS connections that failed CA verification ssl.fail_verify_san, Counter, Total TLS connections that failed SAN verification ssl.fail_verify_cert_hash, Counter, Total TLS connections that failed certificate pinning verification ssl.ciphers., Counter, Total successful TLS connections that used cipher ssl.curves., Counter, Total successful TLS connections that used ECDHE curve ssl.sigalgs., Counter, Total successful TLS connections that used signature algorithm ssl.versions., Counter, Total successful TLS connections that used protocol version .. _config_listener_stats_per_handler: Per-handler Listener Stats -------------------------- Every listener additionally has a statistics tree rooted at *listener.
..* which contains *per-handler* statistics. As described in the :ref:`threading model ` documentation, Envoy has a threading model which includes the *main thread* as well as a number of *worker threads* which are controlled by the :option:`--concurrency` option. Along these lines, ** is equal to *main_thread*, *worker_0*, *worker_1*, etc. These statistics can be used to look for per-handler/worker imbalance on either accepted or active connections. .. csv-table:: :header: Name, Type, Description :widths: 1, 1, 2 downstream_cx_total, Counter, Total connections on this handler. downstream_cx_active, Gauge, Total active connections on this handler. .. _config_listener_manager_stats: Listener manager ---------------- The listener manager has a statistics tree rooted at *listener_manager.* with the following statistics. Any ``:`` character in the stats name is replaced with ``_``. .. csv-table:: :header: Name, Type, Description :widths: 1, 1, 2 listener_added, Counter, Total listeners added (either via static config or LDS) listener_modified, Counter, Total listeners modified (via LDS) listener_removed, Counter, Total listeners removed (via LDS) listener_stopped, Counter, Total listeners stopped listener_create_success, Counter, Total listener objects successfully added to workers listener_create_failure, Counter, Total failed listener object additions to workers total_listeners_warming, Gauge, Number of currently warming listeners total_listeners_active, Gauge, Number of currently active listeners total_listeners_draining, Gauge, Number of currently draining listeners workers_started, Gauge, A boolean (1 if started and 0 otherwise) that indicates whether listeners have been initialized on workers.