diff --git a/scripts/instack-virt-setup b/scripts/instack-virt-setup
index 33ad19aac..964b67508 100755
--- a/scripts/instack-virt-setup
+++ b/scripts/instack-virt-setup
@@ -86,7 +86,7 @@ export NODE_COUNT=${NODE_COUNT:-2}
 export NODE_CNT=$NODE_COUNT
 
 export NODE_ARCH=x86_64
-export NODE_MEM=${NODE_MEM:-5120}
+export NODE_MEM=${NODE_MEM:-6144}
 export NODE_CPU=${NODE_CPU:-1}
 
 
@@ -131,8 +131,8 @@ if [ -n "${ATTACH_EXTRA_DISKS:-}" ]; then
 fi
 
 export UNDERCLOUD_NODE_ARCH=x86_64
-export UNDERCLOUD_NODE_MEM=${UNDERCLOUD_NODE_MEM:-6144}
-export UNDERCLOUD_NODE_CPU=${UNDERCLOUD_NODE_CPU:-2}
+export UNDERCLOUD_NODE_MEM=${UNDERCLOUD_NODE_MEM:-8192}
+export UNDERCLOUD_NODE_CPU=${UNDERCLOUD_NODE_CPU:-4}
 export UNDERCLOUD_NODE_DISK=${UNDERCLOUD_NODE_DISK:-30}
 
 export UNDERCLOUD_INSTALL=${UNDERCLOUD_INSTALL:-1}