Document send and receive latency metrics

diff --git a/docs/performance.rst b/docs/performance.rst
index b25a684e903f780cc10d9a0248594635718c9496..d2730788339741d3a622cdf0a363289eb98059d0 100644 (file)
--- a/docs/performance.rst
+++ b/docs/performance.rst
@@ -286,6 +286,12 @@ rd-queries
 ^^^^^^^^^^
 Number of packets sent by clients requesting recursion (regardless of if we'll be providing them with recursion).
 
+.. _stat-receive-latency:
+
+receive-latency
+^^^^^^^^^^^^^^^
+Average number of microseconds needed to receive a query
+
 .. _stat-recursing-answers:
 
 recursing-answers
@@ -394,6 +400,12 @@ timedout-packets
 ^^^^^^^^^^^^^^^^
 Amount of packets that were dropped because they had to wait too long internally
 
+.. _stat-send-latency:
+
+send-latency
+^^^^^^^^^^^^
+Average number of microseconds needed to send the answer
+
 .. _stat-udp-answers-bytes:
 
 udp-answers-bytes