diff --git a/scripts/partition_vehicle_parts.py b/scripts/partition_vehicle_parts.py
index 539dbb1..9727373 100644
--- a/scripts/partition_vehicle_parts.py
+++ b/scripts/partition_vehicle_parts.py
@@ -30,7 +30,7 @@ from datetime import datetime
 import psycopg2
 
 DSN = os.environ.get('MASTER_DB_URL', 'postgresql://postgres@/nexus_autoparts')
-BATCH_SIZE = 500_000
+BATCH_SIZE = 10_000_000
 PARTITIONS = 16
 
 
@@ -124,8 +124,7 @@ def create_indexes(cur):
         CREATE INDEX idx_vp_new_mye ON vehicle_parts_new(model_year_engine_id);
     """)
     cur.execute("""
-        ALTER TABLE vehicle_parts_new ADD CONSTRAINT uq_vp_new_mye_part
-        UNIQUE (model_year_engine_id, part_id);
+        CREATE INDEX idx_vp_new_mye_part ON vehicle_parts_new(model_year_engine_id, part_id);
     """)
     log("Indexes created.")
 
@@ -167,6 +166,8 @@ def main():
     conn = get_conn()
     conn.autocommit = False
     cur = conn.cursor()
+    cur.execute("SET synchronous_commit = off;")
+    cur.execute("SET work_mem = '256MB';")
 
     try:
         # Check prerequisites