diff --git a/src/harmony/matching/matcher.py b/src/harmony/matching/matcher.py
index 2dfd2da..e450f76 100644
--- a/src/harmony/matching/matcher.py
+++ b/src/harmony/matching/matcher.py
@@ -45,7 +45,8 @@
 import os
 
 
-def get_batch_size(default=50):
+# This has been tested on 16 GB RAM production server, 1000 seems a safe number (TW, 15 Dec 2024)
+def get_batch_size(default=1000): 
     try:
         batch_size = int(os.getenv("BATCH_SIZE", default))
         return max(batch_size, 0)
diff --git a/tests/test_batching_in_matcher.py b/tests/test_batching_in_matcher.py
index b69a5bf..da23f12 100644
--- a/tests/test_batching_in_matcher.py
+++ b/tests/test_batching_in_matcher.py
@@ -67,14 +67,14 @@ def test_negative_batch_size(self):
 
     @mock.patch.dict(os.environ, {}, clear=True)
     def test_default_batch_size(self):
-        """Test when BATCH_SIZE is not set, it defaults to 50."""
+        """Test when BATCH_SIZE is not set, it defaults to 1000."""
         items = [f"item{i}" for i in range(10)]
         results = process_items_in_batches(items, mock_llm_function)
         self.assertEqual(len(results), 10)
 
     @mock.patch.dict(os.environ, {"BATCH_SIZE": "invalid"})
     def test_invalid_batch_size(self):
-        """Test when BATCH_SIZE is invalid, it defaults to 50."""
+        """Test when BATCH_SIZE is invalid, it defaults to 1000."""
         items = [f"item{i}" for i in range(10)]
         results = process_items_in_batches(items, mock_llm_function)
         self.assertEqual(len(results), 10)