diff --git a/dockerfiles/swh-journal-client/client.py b/dockerfiles/swh-journal-client/client.py
index 1dadd64..5b005dc 100644
--- a/dockerfiles/swh-journal-client/client.py
+++ b/dockerfiles/swh-journal-client/client.py
@@ -1,46 +1,45 @@
 # Copyright (C) 2018  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 import logging
 
 from swh.journal.client import JournalClient
 
 
 class JournalClientLogger(JournalClient):
     """Client in charge of listing new received origins and origin_visits
        in the swh journal.
 
     """
     CONFIG_BASE_FILENAME = 'journal/logger'
 
     def __init__(self):
         # Only interested in content here so override the configuration
         super().__init__(extra_configuration={'object_types':
                                               ['origin', 'origin_visit']})
 
     def process_objects(self, messages):
         """Simply log messages received.
 
         """
-        for msg in messages:
-            logging.info('msg: %s' % msg)
+        logging.info('client received the following messages: %s' % messages)
 
 
 if __name__ == '__main__':
     logging.basicConfig(
         level=logging.INFO,
         format='%(asctime)s %(process)d %(levelname)s %(message)s'
     )
 
     import click
 
     @click.command()
     def main():
         """Log the new received origin and origin_visits.
 
         """
         JournalClientLogger().process()
 
     main()
diff --git a/dockerfiles/swh-journal-client/logger.yml b/dockerfiles/swh-journal-client/logger.yml
index 292a7ac..3bda7ee 100644
--- a/dockerfiles/swh-journal-client/logger.yml
+++ b/dockerfiles/swh-journal-client/logger.yml
@@ -1,2 +1,4 @@
 brokers:
   - kafka
+# small number of batch
+max_messages: 1