diff --git a/highspec/neo4j.conf b/highspec/neo4j.conf
index fcbdda1f7426ee9b33e2b332f1de244a2caa763a..334e947416e49b74733de801b4c2304ded4aa59e 100644
--- a/highspec/neo4j.conf
+++ b/highspec/neo4j.conf
@@ -2,6 +2,6 @@ dbms.security.auth_enabled=false
 dbms.connectors.default_listen_address=0.0.0.0
 dbms.read_only=true
 dbms.security.procedures.unrestricted=apoc.*
-dbms.memory.heap.initial_size=30g
-dbms.memory.heap.max_size=30g
-dbms.memory.pagecache.size=30g
+dbms.memory.heap.initial_size=12g
+dbms.memory.heap.max_size=12g
+dbms.memory.pagecache.size=10g
diff --git a/playground/neo4j.conf b/playground/neo4j.conf
index 97b2d9afa32ab882c9e49f109cd84a017dd54c7a..082da24eca042635f3b25b0b50700a3f68baef9b 100644
--- a/playground/neo4j.conf
+++ b/playground/neo4j.conf
@@ -2,7 +2,7 @@ dbms.security.auth_enabled=false
 dbms.connectors.default_listen_address=0.0.0.0
 dbms.read_only=false
 dbms.security.procedures.unrestricted=apoc.*
-dbms.memory.heap.initial_size=500m
-dbms.memory.heap.max_size=500m
-dbms.memory.pagecache.size=200m
+dbms.memory.heap.initial_size=4g
+dbms.memory.heap.max_size=4g
+dbms.memory.pagecache.size=2g
 
diff --git a/playground/startup.sh b/playground/startup.sh
index 02c0243c5aeda74870f227774c869b8a6ace7d46..092a9d708958efbab2db13ff2111de8ba1d35657 100644
--- a/playground/startup.sh
+++ b/playground/startup.sh
@@ -10,7 +10,7 @@ yum install $BASIC_DEPENDENCIES -y
 
 # get Neo4J
 wget $NEO4J_DOWNLOAD_URL
-tar -xvf artifact.php?name=neo4j-community-3.5.13-unix.tar.gz
+tar -xvf artifact.php?name=$NEO4J_SETUP_FILE
 rm artifact.php?name=$NEO4J_SETUP_FILE -f
 mv $NEO4J_VERSION /var/lib/
 
diff --git a/startup_nonroot_amz.sh b/startup_nonroot_amz.sh
index 7d6340d7e788450c4054c3d79f7d84ed760bc7d4..a58f18434d72d0321cb1e64484ede26cdbfa60e5 100644
--- a/startup_nonroot_amz.sh
+++ b/startup_nonroot_amz.sh
@@ -40,7 +40,7 @@ sed -i -e '1idbms.memory.heap.max_size=30g\' $NEO4J_HOME/conf/neo4j.conf
 sed -i -e '1idbms.memory.pagecache.size=30g\' $NEO4J_HOME/conf/neo4j.conf
 
 # get the SSD device name
-device=$(lsblk | grep nvme1n1 | cut -d' ' -f1)
+device=$(lsblk | grep /dev/nvme0n1 | cut -d' ' -f1)
 
 # create an ext4 partition on the disk
 sudo mkfs.ext4 -E nodiscard -m0 /dev/$device