docs: notes on 'bind-check-interval' <-> 'slave-cycle-interval'

diff --git a/docs/backends/bind.rst b/docs/backends/bind.rst
index 73da47a0e8745e1d405d3bdab35d7385cd38eb0d..5434f3ec58fd8aa9f8e95eaf252f292ab4de225b 100644 (file)
--- a/docs/backends/bind.rst
+++ b/docs/backends/bind.rst
@@ -119,6 +119,12 @@ If :ref:`setting-bind-check-interval` is specified as
 zero, no checks will be performed until the ``pdns_control reload`` is
 given.
 
+Please note that also the :ref:`setting-slave-cycle-interval` setting
+controls how often a master would notify a slave about changes.
+Especially in 'hidden master' configurations, where servers usually
+don't receive regular queries, you may want to lower that setting to a
+value as low as :ref:`setting-bind-check-interval`.
+
 pdns\_control commands
 ----------------------