diff --git a/roles/cardano_node/defaults/main.yml b/roles/cardano_node/defaults/main.yml
index 05fbf09..9ef212f 100644
--- a/roles/cardano_node/defaults/main.yml
+++ b/roles/cardano_node/defaults/main.yml
@@ -5,9 +5,16 @@ cardano_node_install_method: 'docker'
 # Cardano node version
 cardano_node_version: '1.35.7'
 
+# Cardano network
+cardano_node_network: mainnet
+
 # Base host directory for node data
 cardano_node_dir: /opt/cardano
 
+# Config directory for host/container
+cardano_node_config_dir: '{{ cardano_node_dir }}/config'
+cardano_node_config_container_dir: '{{ cardano_node_config_dir }}'
+
 # DB directory for host/container
 cardano_node_db_dir: '{{ cardano_node_dir }}/data'
 cardano_node_db_container_dir: '{{ cardano_node_db_dir }}'
@@ -16,6 +23,10 @@ cardano_node_db_container_dir: '{{ cardano_node_db_dir }}'
 cardano_node_ipc_dir: '{{ cardano_node_dir }}/ipc'
 cardano_node_ipc_container_dir: '{{ cardano_node_ipc_dir }}'
 
+# Topology directory for host/container
+cardano_node_topology_dir: '{{ cardano_node_config_dir }}'
+cardano_node_topology_container_dir: '{{ cardano_node_topology_dir }}'
+
 # User/group for file/directory ownership
 cardano_node_user: root
 cardano_node_group: root
@@ -40,14 +51,15 @@ cardano_node_metrics_port: '{{ cardano_node_metrics_container_port }}'
 # Socket file name
 cardano_node_socket_name: node.socket
 
-# Cardano network
-cardano_node_network: mainnet
+# RTS tuning
+cardano_node_rts_flags: '-N2 -A64m -I0 -qg -qb --disable-delayed-os-memory-return'
 
 # Config
-cardano_node_config_file: '{{ cardano_node_dir }}/config/{{ cardano_node_network }}-config.json'
+cardano_node_manage_config: false # this currently does nothing
+cardano_node_config_file: '{{ cardano_node_config_container_dir }}/{{ cardano_node_network }}-config.json'
 
 # Topology
-cardano_node_topology_file: '{{ cardano_node_dir }}/config/{{ cardano_node_network }}-topology.json'
+cardano_node_topology_file: '{{ cardano_node_topology_container_dir }}/{{ cardano_node_network }}-topology.json'
 
 # Install chrony
 chrony_enabled: true
diff --git a/roles/cardano_node/tasks/docker.yml b/roles/cardano_node/tasks/docker.yml
index a9fc568..7143f09 100644
--- a/roles/cardano_node/tasks/docker.yml
+++ b/roles/cardano_node/tasks/docker.yml
@@ -23,6 +23,7 @@
       CARDANO_NETWORK: '{{ cardano_node_network }}'
       CARDANO_NODE_SOCKET_PATH: '{{ cardano_node_ipc_container_dir }}/{{ cardano_node_socket_name }}'
       CARDANO_PORT: '{{ cardano_node_port | string }}'
+      CARDANO_RTS_OPTS: '{{ cardano_node_rts_flags }}'
       CARDANO_SOCKET_PATH: '{{ cardano_node_ipc_container_dir }}/{{ cardano_node_socket_name }}'
       CARDANO_TOPOLOGY: '{{ cardano_node_topology_file }}'
     volumes: