diff --git a/src/backend/utils/init/globals.c b/src/backend/utils/init/globals.c
index eb19644419..74b52b7132 100644
--- a/src/backend/utils/init/globals.c
+++ b/src/backend/utils/init/globals.c
@@ -118,8 +118,8 @@ int			IntervalStyle = INTSTYLE_POSTGRES;
 
 bool		enableFsync = true;
 bool		allowSystemTableMods = false;
-int			work_mem = 1024;
-int			maintenance_work_mem = 16384;
+int			work_mem = 4096;
+int			maintenance_work_mem = 65536;
 int			max_parallel_maintenance_workers = 2;
 
 /*