diff --git a/plugins/system/membyuser b/plugins/system/membyuser
new file mode 100644
index 00000000..9b869cca
--- /dev/null
+++ b/plugins/system/membyuser
@@ -0,0 +1,60 @@
+#!/bin/bash
+#
+# Plugin to monitor Memory usage inspired by cpubyuser 
+# 
+# 2012-05-23 Sebastien Campion
+
+LU=`ps auh | cut -d' ' -f 1  | sort -u`
+USERS=`echo $LU`
+
+if [ "$1" = "autoconf" ]; then
+	if [ -n "$USERS" ]; then
+		echo "yes"
+	else
+		echo "\$USERS not defined."
+	fi
+	exit
+fi
+
+if [ "$1" = "config" ]; then
+	echo "graph_args --base 1000 -r --lower-limit 0"
+	echo "graph_title Memory usage, by user"
+	echo "graph_category system"
+	echo "graph_info This graph shows memory usage, for monitored users."
+	echo "graph_vlabel KB"
+	echo "graph_scale no"
+	echo "graph_period second"
+	_USERS=${USERS//[-.]/_}
+	echo "graph_order $_USERS others"
+	FIRSTUSER=1;
+	for USER in $USERS "others"; do
+		_USER=${USER//[-.]/_}
+		echo "${_USER}.label $USER"
+		echo "${_USER}.info Memory used by user $USER"
+		echo "${_USER}.type GAUGE"
+		if [ $FIRSTUSER -eq 1 ]; then
+			echo "${_USER}.draw AREA"
+			FIRSTUSER=0
+		else
+			echo "${_USER}.draw STACK"
+		fi
+	done
+	exit
+fi
+
+ps -e -o "%z%U" | \
+	awk -v USERS="$USERS" '
+		{ if ($2 != "USER") MEM_USER[$2]+=$1 }
+		END {
+			others_sum = 0
+			for (user in MEM_USER) {
+				m = match(USERS,user)
+				if (m != 0) {
+					_user=user
+					gsub(/[-.]/,"_", _user);
+					print _user".value", MEM_USER[user]
+				} else
+					others_sum += MEM_USER[user]
+			}
+		print "others.value", others_sum;
+	}'