diff --git a/workers/tagbackfillworker.py b/workers/tagbackfillworker.py
index cedcc4134..a7115e919 100644
--- a/workers/tagbackfillworker.py
+++ b/workers/tagbackfillworker.py
@@ -119,6 +119,7 @@ class TagBackfillWorker(Worker):
 
   def _filter(self, query):
     if self._namespace_filter:
+      logger.info('Filtering by namespace `%s`', self._namespace_filter)
       namespace_user = get_namespace_user(self._namespace_filter)
       query = query.join(Repository).where(Repository.namespace_user == namespace_user)
 
@@ -133,6 +134,8 @@ class TagBackfillWorker(Worker):
     min_id = (self._filter(RepositoryTag.select(fn.Min(RepositoryTag.id))).scalar())
     max_id = self._filter(RepositoryTag.select(fn.Max(RepositoryTag.id))).scalar()
 
+    logger.info('Found candidate range %s-%s', min_id, max_id)
+
     iterator = yield_random_entries(
       missing_tmt_query,
       RepositoryTag.id,