diff --git a/README.rst b/README.rst
index beb4b3e..2e41e81 100644
--- a/README.rst
+++ b/README.rst
@@ -84,6 +84,20 @@
             address: 'git@repo1.domain.cz:impress/billometer.git'
             revision: 'master'
 
+Tune settings of mpm_prefork
+
+.. code-block:: yaml
+
+    parameters:
+      apache:
+        mpm:
+          prefork:
+            max_clients: 250
+            servers:
+              min: 32
+              max: 64
+              max_requests: 4000
+
 Example pillar
 ==============
 
diff --git a/apache/files/mpm/mpm_prefork.conf b/apache/files/mpm/mpm_prefork.conf
new file mode 100644
index 0000000..ab4c356
--- /dev/null
+++ b/apache/files/mpm/mpm_prefork.conf
@@ -0,0 +1,17 @@
+{%- from "apache/map.jinja" import server with context %}
+# prefork MPM
+# StartServers: number of server processes to start
+# MinSpareServers: minimum number of server processes which are kept spare
+# MaxSpareServers: maximum number of server processes which are kept spare
+# MaxRequestWorkers: maximum number of server processes allowed to start
+# MaxConnectionsPerChild: maximum number of requests a server process serves
+
+<IfModule mpm_prefork_module>
+    StartServers            {{ server.mpm.prefork.servers.start }}
+    MinSpareServers         {{ server.mpm.prefork.servers.spare.min }}
+    MaxSpareServers         {{ server.mpm.prefork.servers.spare.max }}
+    MaxRequestWorkers       {{ server.mpm.prefork.max_clients }}
+    MaxConnectionsPerChild  {{ server.mpm.prefork.servers.max_requests }}
+</IfModule>
+
+# vim: syntax=apache ts=4 sw=4 sts=4 sr noet
diff --git a/apache/server/service.sls b/apache/server/service.sls
index dc49394..44b7565 100644
--- a/apache/server/service.sls
+++ b/apache/server/service.sls
@@ -93,4 +93,39 @@
   - require:
     - service: apache_service_dead
 
+{%- for mpm_type, mpm in server.mpm.iteritems() %}
+
+{%- if mpm.enabled %}
+
+apache_mpm_{{ mpm_type }}_enable:
+  cmd.run:
+  - name: "a2enmod mpm_{{ mpm_type }}"
+  - creates: /etc/apache2/mods-enabled/mpm_{{ mpm_type }}.load
+  - require:
+    - file: apache_mpm_{{ mpm_type }}_config
+  - watch_in:
+    - service: apache_service
+
+apache_mpm_{{ mpm_type }}_config:
+  file.managed:
+  - name /etc/apache2/mods-available/mpm_{{ mpm_type }}.conf
+  - source: salt://apache/files/mpm/mpm_{{ mpm_type }}.conf
+  - template: jinja
+  - require:
+    - pkg: apache_packages
+  - watch_in:
+    - service: apache_service
+
+{%- else %}
+
+apache_mpm_{{ mpm_type }}_disable:
+  file.absent:
+  - name: /etc/apache2/mods-enabled/mpm_{{ mpm_type }}.load
+  - watch_in:
+    - service: apache_service
+
+{%- endif %}
+
+{%- endfor %}
+
 {%- endif %}
diff --git a/metadata/service/server/single.yml b/metadata/service/server/single.yml
index 21f3319..0f2aef6 100644
--- a/metadata/service/server/single.yml
+++ b/metadata/service/server/single.yml
@@ -13,3 +13,21 @@
       modules:
       - ssl
       - rewrite
+      mpm:
+        prefork:
+          enabled: true
+          servers:
+            start: 5
+            spare:
+              min: ${apache:server:mpm:servers:start}
+              max: 10
+            # Avoid memory leakage by restarting workers every x requests
+            max_requests: 0
+          # Should be 80% of server memory / average memory usage of one worker
+          max_clients: 150
+          # Should be same or more than max clients
+          limit: ${apache:server:mpm:max_clients}
+        event:
+          enabled: false
+        worker:
+          enabled: false