Merge pull request #3621 from edx/derf/Neo4j_heap_size_override

Neo4j heap size override

playbooks/roles/neo4j/defaults/main.yml

@@ -22,9 +22,11 @@ neo4j_gpg_key_url: https://debian.neo4j.org/neotechnology.gpg.key
 neo4j_apt_repository: "deb http://debian.neo4j.org/repo stable/"
 neo4j_version: "3.0.3"
 neo4j_server_config_file: "/etc/neo4j/neo4j.conf"
+neo4j_wrapper_config_file: "/etc/neo4j/neo4j-wrapper.conf"
 neo4j_https_port: 7473  # default in package is 7473
 neo4j_http_port: 7474  # default in package is 7474
 neo4j_listen_address: "0.0.0.0"
+neo4j_heap_max_size: "3000"
 
 # Properties file settings
 neo4j_https_settings_key: "dbms.connector.https.address"

playbooks/roles/neo4j/tasks/main.yml

@@ -45,6 +45,15 @@
     - install
     - install:base
 
+- name: set neo4j heap size
+  lineinfile:
+    dest: "{{ neo4j_wrapper_config_file }}"
+    regexp: "dbms.memory.heap.max_size="
+    line: "dbms.memory.heap.max_size={{ neo4j_heap_max_size }}"
+  tags:
+    - install
+    - install:configuration
+
 - name: set to listen on specific port for https
   lineinfile:
     dest: "{{ neo4j_server_config_file }}"