diff --git a/defaults/main.yml b/defaults/main.yml
index 5fc05a7..020cc50 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -7,6 +7,10 @@ postgresql_group: postgres
 
 postgresql_unix_socket_dir: /var/run/postgresql
 
+postgresql_global_config_options:
+  - option: unix_socket_directory
+    value: '{{ postgresql_unix_socket_dir }}'
+
 # Debian only. Used to generate the locales used by PostgreSQL databases.
 postgresql_locales:
   - 'en_US.UTF-8'
diff --git a/tasks/initialize.yml b/tasks/initialize.yml
index 44ffd9b..3196ba6 100644
--- a/tasks/initialize.yml
+++ b/tasks/initialize.yml
@@ -6,6 +6,21 @@
     mode: 0644
   notify: restart postgresql
 
+- name: Configure global settings.
+  lineinfile:
+    dest: "{{ postgresql_config_path }}/postgresql.conf"
+    regexp: "^#?{{ item.option }}.+$"
+    line: "{{ item.option }} = '{{ item.value }}'"
+    state: "{{ item.state | default('present') }}"
+  with_items: "{{ postgresql_global_config_options }}"
+  notify: restart postgresql
+
+- name: Ensure PostgreSQL unix socket dir exists.
+  file:
+    path: "{{ postgresql_unix_socket_dir }}"
+    state: directory
+    mode: 0777
+
 - name: Ensure PostgreSQL data directory exists.
   file:
     path: "{{ postgresql_data_dir }}"
diff --git a/tasks/variables.yml b/tasks/variables.yml
index 08870f4..a0b622d 100644
--- a/tasks/variables.yml
+++ b/tasks/variables.yml
@@ -32,3 +32,8 @@
   set_fact:
     postgresql_bin_path: "{{ __postgresql_bin_path }}"
   when: postgresql_bin_path is not defined
+
+- name: Define postgresql_config_path.
+  set_fact:
+    postgresql_config_path: "{{ __postgresql_config_path }}"
+  when: postgresql_config_path is not defined
diff --git a/vars/Debian-8.yml b/vars/Debian-8.yml
index 9fd995a..f6ad232 100644
--- a/vars/Debian-8.yml
+++ b/vars/Debian-8.yml
@@ -2,6 +2,7 @@
 __postgresql_version: "9.4"
 __postgresql_data_dir: "/var/lib/postgresql/{{ __postgresql_version }}/main"
 __postgresql_bin_path: "/usr/lib/postgresql/{{ __postgresql_version }}/bin"
+__postgresql_config_path: "/etc/postgresql/{{ __postgresql_version }}/main"
 __postgresql_daemon: postgresql
 __postgresql_packages:
   - postgresql
diff --git a/vars/RedHat.yml b/vars/RedHat.yml
index 43ffeb6..1d5c517 100644
--- a/vars/RedHat.yml
+++ b/vars/RedHat.yml
@@ -2,6 +2,7 @@
 __postgresql_version: "9.2"
 __postgresql_data_dir: "/var/lib/pgsql/data"
 __postgresql_bin_path: "/usr/bin"
+__postgresql_config_path: "/var/lib/pgsql/data"
 __postgresql_daemon: postgresql
 __postgresql_packages:
   - postgresql
diff --git a/vars/Ubuntu-14.yml b/vars/Ubuntu-14.yml
index cd09ffa..bd6c174 100644
--- a/vars/Ubuntu-14.yml
+++ b/vars/Ubuntu-14.yml
@@ -2,6 +2,7 @@
 __postgresql_version: "9.3"
 __postgresql_data_dir: "/var/lib/postgresql/{{ __postgresql_version }}/main"
 __postgresql_bin_path: "/usr/lib/postgresql/{{ __postgresql_version }}/bin"
+__postgresql_config_path: "/etc/postgresql/{{ __postgresql_version }}/main"
 __postgresql_daemon: postgresql
 __postgresql_packages:
   - postgresql
diff --git a/vars/Ubuntu-16.yml b/vars/Ubuntu-16.yml
index 77fde1f..cf2ebb8 100644
--- a/vars/Ubuntu-16.yml
+++ b/vars/Ubuntu-16.yml
@@ -2,6 +2,7 @@
 __postgresql_version: "9.5"
 __postgresql_data_dir: "/var/lib/postgresql/{{ __postgresql_version }}/main"
 __postgresql_bin_path: "/usr/lib/postgresql/{{ __postgresql_version }}/bin"
+__postgresql_config_path: "/etc/postgresql/{{ __postgresql_version }}/main"
 __postgresql_daemon: postgresql
 __postgresql_packages:
   - postgresql