diff --git a/chapter2/mysite/myapp/static/scripts/index.js b/chapter2/mysite/myapp/static/scripts/index.js
index 5ec6d67..60abf9a 100755
--- a/chapter2/mysite/myapp/static/scripts/index.js
+++ b/chapter2/mysite/myapp/static/scripts/index.js
@@ -2,6 +2,10 @@ var symptomName = last_month_day();
 
 $(function(){
 
+    var to_g = function(v){
+        return (parseInt(v)/1024/1024).toFixed(1);
+    }
+
     //更新抓取信息
     setInterval(function(){
 
@@ -18,8 +22,8 @@ $(function(){
     $.ajax('/myapp/api/platform_info.json').done(function(data){
         $('#disk_freed').html(data.disk_freed+'G');
         $('#disk_used').html(data.disk_used+'G');
-        $('#mem_free').html(data.mem_free+'G');
-        $('#mem_used').html(data.mem_used+'G');
+        $('#mem_free').html(to_g(data.mem_total-data.mem_used)+'G');
+        $('#mem_used').html(to_g(data.mem_used)+'G');
         $('#tasks_count').html(data.tasks);
     });