diff --git a/swift/proxy/controllers/container.py b/swift/proxy/controllers/container.py
index 529fbd1aaf..85f43bfdff 100644
--- a/swift/proxy/controllers/container.py
+++ b/swift/proxy/controllers/container.py
@@ -239,8 +239,8 @@ class ContainerController(Controller):
             memcache = cache_from_env(req.environ, True)
             if memcache and ns_bound_list:
                 # cache in memcache only if shard ranges as expected
-                self.logger.debug('Caching %d shards for %s',
-                                  len(ns_bound_list.bounds), req.path_qs)
+                self.logger.info('Caching listing shards for %s (%d shards)',
+                                 cache_key, len(ns_bound_list.bounds))
                 memcache.set(cache_key, ns_bound_list.bounds,
                              time=self.app.recheck_listing_shard_ranges)
         return ns_bound_list
diff --git a/swift/proxy/controllers/obj.py b/swift/proxy/controllers/obj.py
index 4f3ed304d6..cdc354f701 100644
--- a/swift/proxy/controllers/obj.py
+++ b/swift/proxy/controllers/obj.py
@@ -386,6 +386,9 @@ class BaseObjectController(Controller):
                     shard_ranges)
                 infocache[cache_key] = cached_namespaces
                 if memcache:
+                    self.logger.info(
+                        'Caching updating shards for %s (%d shards)',
+                        cache_key, len(cached_namespaces.bounds))
                     memcache.set(
                         cache_key, cached_namespaces.bounds,
                         time=self.app.recheck_updating_shard_ranges)
diff --git a/test/unit/proxy/controllers/test_container.py b/test/unit/proxy/controllers/test_container.py
index d8b1367578..f0bd3ae693 100644
--- a/test/unit/proxy/controllers/test_container.py
+++ b/test/unit/proxy/controllers/test_container.py
@@ -3210,6 +3210,10 @@ class TestContainerController(TestRingBase):
                  'shard-listing-v2/a/c', self.ns_bound_list.bounds, time=600),
              mock.call.set('container/a/c', mock.ANY, time=60)],
             self.memcache.calls)
+        info_lines = self.logger.get_lines_for_level('info')
+        self.assertIn(
+            'Caching listing shards for shard-listing-v2/a/c (3 shards)',
+            info_lines)
         # shards were cached
         self.assertEqual('sharded',
                          self.memcache.calls[2][1][1]['sharding_state'])
diff --git a/test/unit/proxy/test_server.py b/test/unit/proxy/test_server.py
index 2e4da07544..1082a23717 100644
--- a/test/unit/proxy/test_server.py
+++ b/test/unit/proxy/test_server.py
@@ -4358,6 +4358,10 @@ class TestReplicatedObjectController(
                               'object.shard_updating.cache.miss.200': 1},
                              stats)
             self.assertEqual([], self.app.logger.log_dict['set_statsd_prefix'])
+            info_lines = self.logger.get_lines_for_level('info')
+            self.assertIn(
+                'Caching updating shards for shard-updating-v2/a/c (3 shards)',
+                info_lines)
 
             backend_requests = fake_conn.requests
             account_request = backend_requests[0]