diff --git a/init.sls b/init.sls
index c5e45d9..2021ff6 100644
--- a/init.sls
+++ b/init.sls
@@ -5,13 +5,6 @@ include:
 {% set pg_pref = '/etc/apt/preferences.d/pgdg.pref' %}
 
 
-postgresql:
-  service:
-    - running
-    - require:
-      - pkg: postgresql_packages
-
-
 postgresql_packages:
   pkg.installed:
     - pkgs:
@@ -25,3 +18,31 @@ postgresql_packages:
       - cmd.run: add_postgresql_apt_key
       - file: {{ pg_list }}
       - file: {{ pg_pref }}
+
+
+{% set postgresql_conf = '/etc/postgresql/9.2/main/postgresql.conf' %}
+{{ postgresql_conf }}:
+  file.managed:
+    - source: salt://postgresql/files{{ postgresql_conf }}
+    - template: jinja
+    - user: postgres
+    - group: postgres
+    - mode: 0644
+    - require:
+      - pkg: postgresql_packages
+
+
+{% set mem = 8192 if 8192 < (grains['mem_total'] / 4) else (grains['mem_total'] / 4) %}
+kernel.shmmax:
+  sysctl.present:
+    - value: {{ (1024**2 * mem * 1.1)|int }}
+
+
+postgresql:
+  service:
+    - running
+    - require:
+      - sysctl: kernel.shmmax
+      - pkg: postgresql_packages
+    - watch:
+      - file: {{ postgresql_conf }}