diff --git a/src/data_index/defaults/cluster.py b/src/data_index/defaults/cluster.py
index 270bc7f..0c44eb9 100644
--- a/src/data_index/defaults/cluster.py
+++ b/src/data_index/defaults/cluster.py
@@ -70,7 +70,7 @@
 # --- Partitioner config ---
 _greedy_partitioner = GreedyBatchPartitioner(
     max_files=BATCH_SIZE,
-    max_bytes=50 * 1024**3,
+    max_bytes=10 * 1024**3,
 )
 
 # --- File fetcher ---