http://bugs.python.org/issue6267
Cumulative patch to http and xmlrpc
diff --git a/Doc/library/simplexmlrpcserver.rst b/Doc/library/simplexmlrpcserver.rst
index 1591f90..72b2365 100644
--- a/Doc/library/simplexmlrpcserver.rst
+++ b/Doc/library/simplexmlrpcserver.rst
@@ -133,6 +133,15 @@
 
    .. versionadded:: 2.5
 
+.. attribute:: SimpleXMLRPCRequestHandler.encode_threshold
+
+   If this attribute is not ``None``, responses larger than this value
+   will be encoded using the *gzip* transfer encoding, if permitted by
+   the client.  The default is ``1400`` which corresponds roughly
+   to a single TCP packet.
+
+   .. versionadded:: 2.7
+
 .. _simplexmlrpcserver-example:
 
 SimpleXMLRPCServer Example