diff --git a/swh/indexer/metadata.py b/swh/indexer/metadata.py
--- a/swh/indexer/metadata.py
+++ b/swh/indexer/metadata.py
@@ -5,6 +5,8 @@
 
 from copy import deepcopy
 
+from swh.core.utils import grouper
+
 from swh.indexer.indexer import ContentIndexer, RevisionIndexer, OriginIndexer
 from swh.indexer.origin_head import OriginHeadIndexer
 from swh.indexer.metadata_dictionary import MAPPINGS
@@ -15,6 +17,9 @@
 from swh.model import hashutil
 
 
+REVISION_GET_BATCH_SIZE = 10
+
+
 class ContentMetadataIndexer(ContentIndexer):
     """Content-level indexer
 
@@ -276,7 +281,10 @@
                 origins_with_head.append(origin)
                 head_rev_ids.append(head_result['revision_id'])
 
-        head_revs = list(self.storage.revision_get(head_rev_ids))
+        head_revs = []
+        groups = grouper(head_rev_ids, REVISION_GET_BATCH_SIZE)
+        for group in groups:
+            head_revs.extend(self.storage.revision_get(group))
         assert len(head_revs) == len(head_rev_ids)
 
         results = []