Issue #21443: Show how to change log level for asyncio.
diff --git a/Doc/library/asyncio-dev.rst b/Doc/library/asyncio-dev.rst
index e9ec638..cc4a14b 100644
--- a/Doc/library/asyncio-dev.rst
+++ b/Doc/library/asyncio-dev.rst
@@ -161,6 +161,14 @@
The :mod:`asyncio` module logs information with the :mod:`logging` module in
the logger ``'asyncio'``.
+The default log level for the :mod:`asyncio` module is :py:data:`logging.INFO`.
+For those not wanting such verbosity from :mod:`asyncio` the log level can
+be changed. For example, to change the level to :py:data:`logging.WARNING`:
+
+.. code-block:: none
+
+ logging.getLogger('asyncio').setLevel(logging.WARNING)
+
.. _asyncio-coroutine-not-scheduled: