diff --git a/README.md b/README.md
index 3c66d59..4f8198d 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,14 @@ For the old behaviour, you need to set listen to '0.0.0.0'.
     }
 ```
 
+### Keep persistent data upon service restart (https://docs.memcached.org/features/restart/)
+
+```ruby
+    class { 'memcached':
+      extra_config => ["-e /tmpfs_mount/memory_file"]
+    }
+```
+
 ### Install multiple memcached instances
 
 the multiinstance support uses a systemd instance unit file. This will be placed
diff --git a/REFERENCE.md b/REFERENCE.md
index c085b0c..358b909 100644
--- a/REFERENCE.md
+++ b/REFERENCE.md
@@ -80,6 +80,7 @@ The following parameters are available in the `memcached` class:
 * [`svcprop_fmri`](#-memcached--svcprop_fmri)
 * [`svcprop_key`](#-memcached--svcprop_key)
 * [`extended_opts`](#-memcached--extended_opts)
+* [`extra_config`](#-memcached--extra_config)
 * [`config_tmpl`](#-memcached--config_tmpl)
 * [`disable_cachedump`](#-memcached--disable_cachedump)
 * [`max_reqs_per_event`](#-memcached--max_reqs_per_event)
@@ -401,6 +402,14 @@ Array of extended options
 
 Default value: `undef`
 
+##### <a name="-memcached--extra_config"></a>`extra_config`
+
+Data type: `Optional[Array[String]]`
+
+Array of extended configarion options
+
+Default value: `undef`
+
 ##### <a name="-memcached--config_tmpl"></a>`config_tmpl`
 
 Data type: `String`
diff --git a/manifests/init.pp b/manifests/init.pp
index e4a2964..95d7155 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -118,6 +118,9 @@
 # @param extended_opts
 #   Array of extended options
 #
+# @param extra_config
+#   Array of extended configarion options
+#
 # @param config_tmpl
 #   Use a different config template
 #
@@ -177,6 +180,7 @@
   String $svcprop_fmri                                                                       = 'memcached:default',
   String $svcprop_key                                                                        = 'memcached/options',
   Optional[Array[String]] $extended_opts                                                     = undef,
+  Optional[Array[String]] $extra_config                                                      = undef,
   String $config_tmpl                                                                        = $memcached::params::config_tmpl,
   Boolean $disable_cachedump                                                                 = false,
   Optional[Integer] $max_reqs_per_event                                                      = undef,
diff --git a/templates/memcached.conf.erb b/templates/memcached.conf.erb
index 3fc3f92..4b93eaa 100644
--- a/templates/memcached.conf.erb
+++ b/templates/memcached.conf.erb
@@ -98,6 +98,10 @@ logfile <%= @logfile -%>
 -o <%= @extended_opts.join(',') -%>
 <% end -%>
 
+<% if @extra_config -%>
+<%= @extra_config.join(',') -%>
+<% end -%>
+
 <% if @disable_cachedump -%>
 -X
 <% end -%>