Enable cpu/memory accounting for postgres

Signed-off-by: Florian Pritz <bluewind@xinu.at>

roles/postgres/tasks/main.yml

@@ -25,6 +25,9 @@
 - name: start and enable postgres
   service: name=postgresql enabled=yes state=started
 
+- name: enable systemd ressource accounting
+  command: systemctl set-property postgresql CPUAccounting=yes MemoryAccounting=yes
+
 - name: set postgres user password
   postgresql_user: name=postgres password={{ postgres_users.postgres }} encrypted=yes
   become: yes