diff --git a/plugins/lxc/lxc_ram b/plugins/lxc/lxc_ram
index db770778..004f829a 100755
--- a/plugins/lxc/lxc_ram
+++ b/plugins/lxc/lxc_ram
@@ -12,10 +12,18 @@ lxc_ram - Plugin to monitor LXC memory usage.
   [lxc_*]
     user root
 
+  [lxc_ram]
+    env.stack_usage true
+
 =head1 INTERPRETATION
 
 This plugin needs root privilege.
 
+If env.stack_usage is set to true, all memory usages of containers will be
+ drawn as stacked area charts.
+This option changes graph order, all of 'Mem usage' comes first and then others.
+(default: empty)
+
 =head1 AUTHOR
 
 vajtsz vajtsz@gmail.com
@@ -62,13 +70,24 @@ if [ "$1" = "config" ]; then
  echo 'graph_vlabel byte'
  echo 'graph_category memory'
 
+ if [ "$stack_usage" = "true" ]; then
+  for guest_name in $guest_names; do
+    guest="$(clean_fieldname $guest_name)"
+
+    echo 'mem_usage_'$guest'.label '$guest_name': Mem usage'
+    echo 'mem_usage_'$guest'.type GAUGE'
+    echo 'mem_usage_'$guest'.draw AREASTACK'
+  done
+ fi
 
  for guest_name in $guest_names;
   do
    guest="$(clean_fieldname $guest_name)"
 
-   echo 'mem_usage_'$guest'.label '$guest_name': Mem usage'
-   echo 'mem_usage_'$guest'.type GAUGE'
+   if [ "$stack_usage" != "true" ]; then
+    echo 'mem_usage_'$guest'.label '$guest_name': Mem usage'
+    echo 'mem_usage_'$guest'.type GAUGE'
+   fi
    echo 'mem_cache_'$guest'.label '$guest_name': Cache'
    echo 'mem_cache_'$guest'.type GAUGE'
    echo 'mem_active_'$guest'.label '$guest_name': Active'