diff --git a/docs/ref/models/querysets.txt b/docs/ref/models/querysets.txt
index 8583719..1134311 100644
--- a/docs/ref/models/querysets.txt
+++ b/docs/ref/models/querysets.txt
@@ -1456,6 +1456,15 @@ evaluated will force it to evaluate again, repeating the query.
 Also, use of ``iterator()`` causes previous ``prefetch_related()`` calls to be
 ignored since these two optimizations do not make sense together.
 
+.. warning::
+
+    Some Python database drivers, like ``psycopg2`` perform caching if using
+    client side cursors (the default). Using ``iterator()`` does not affect
+    caching at the database driver level. To disable this caching, look at
+    `server side cursors`_.
+
+.. _server side cursors: http://initd.org/psycopg/docs/usage.html#server-side-cursors
+
 latest
 ~~~~~~